Oh Boy Did the Tune up today.... Sort of.

This morning I started her up. Sat for a minute as my passengers got in and buckled up. Went to take off and almost stalled. No power seemed as tho she was gonna die. "service engine soon" blinked franticaly. Then as i entered the highway she sputtered some more. oh and the oil pressure was going between 40 and 60 almost reachin 80. I stopped gained my senses and continued on my journey. She runs ok now oil pressure is between 40 and 60 more like 50ish. Still hesitates a little. I got pissed off and smoked'em around a corner. So she is still in there. And Sevice Engine light is on solid now. Any clues. Im changin oil and filter. dont think it is related to my problem tho. Plugs and wires were replaced only a few months ago. could the hesitation be fuel injector or filter related????? Any help will be much appriciated.

Could be fuel filter, could be an o2 sensor either going whacky or sensing a real issue. Could be carbon built up on the plugs but as you said they are pretty new. Maybe bad gas? Try filling up with super and seeing what happens after that tank. But what you need to do most of all is get those codes read and find out what the problem is asap! Autozone does it for free! Come back to us with the codes and what they mean and we might be able to help farther but I am sure you will have it figured out by then! Good luck

Could be fuel filter, could be an o2 sensor either going whacky or sensing a real issue. Could be carbon built up on the plugs but as you said they are pretty new. Maybe bad gas? Try filling up with super and seeing what happens after that tank. But what you need to do most of all is get those codes read and find out what the problem is asap! Autozone does it for free! Come back to us with the codes and what they mean and we might be able to help farther but I am sure you will have it figured out by then! Good luck

Stop leading her on a wild goose chase and wasting money. The check engine light is on and you are going to ignore it??!!

The check engine light is on, you tell her to go to Autozone and have the codes scanned for free and come back here with the actual code.

You don't just start putting random ideas forth to confuse people. You are only making her situation worse.

Stop leading her on a wild goose chase and wasting money. The check engine light is on and you are going to ignore it??!!

The check engine light is on, you tell her to go to Autozone and have the codes scanned for free and come back here with the actual code.

You don't just start putting random ideas forth to confuse people. You are only making her situation worse.

I told her she can get the codes checked out! How am I making her situation worse? I gave her some probables of what it could be, I didn't say this is your issue. If you read my reply I did tell her to go to Autozone and get it checked out. I wrote it could be. I never said get this and that checked out and replace this. I said "could" be. You do understand the definition of that right??? GirlBear, I apologize I didn't just write go to Autozone and get the codes read first before I said anything else. Enough said

here they be. I read the other thread were the guy was havin same sort of issues and MAF sensor was answer. I must add that When I reset the memory by disconnecting the po+ cable to battery. She ran real good. I was thinkin about reseting it again. or will that just make things worse?
http://img98.imageshack.us/img98/5421/scanimage0010mf.jpg

MAF sensor.. do you use a K&N filter? I know that K&N say it doesn't, but the filter oil can clog the sensor and make it go wacky.

Over oiling is usually the culprit.

This is the passenger side manifold O2 sensor is bad and needs changing. If it was the MAF, both manifold sensors would be causing errors.

What is needed here is a new O2 sensor and a tuneup.

This is the passenger side manifold O2 sensor is bad and needs changing. If it was the MAF, both manifold sensors would be causing errors.

What is needed here is a new O2 sensor and a tuneup.
Listen to this shit. I bought some Gumout fuel injection cleaner. And wires and Plugs. Put in the gumout. Ihad a bunch of errands to do. Drove about 50+ miles all together. go home. Eat. Start her up no "Service engine Soon" light. Runns perfect again. I'm gonna tune it up tomarrow. but Wut the hell. did that cleaner fix it?

Listen to this shit. I bought some Gumout fuel injection cleaner. And wires and Plugs. Put in the gumout. Ihad a bunch of errands to do. Drove about 50+ miles all together. go home. Eat. Start her up no "Service engine Soon" light. Runns perfect again. I'm gonna tune it up tomarrow. but Wut the hell. did that cleaner fix it?

You really need to start listening Girlbear.

Replace that O sensor and do a tuneup including:

Fuel filter
Spark plugs AC Delco Platinum only
Cap & Rotor
Air Filter
PCV Valve

You really need to start listening Girlbear.

Replace that O sensor and do a tuneup including:

Fuel filter
Spark plugs AC Delco Platinum only
Cap & Rotor
Air Filter
PCV Valve

I do not have enough info or knowledge to disagree with blazerLT, but I can say this: I had the same codes on my 97 and the same thing happened. Went up a big hill and got O2 codes and P0300 misfire codes. Erased all the codes, ate dinner, and it has not happened again since (now over a week later). I would not replace the O2 sensor. If the O2 sensor is bad, the O2 sensor codes will most likely reappear on your truck very soon. THEN, I would replace an O2 sensor, but not before. Unless you have 50 bucks to burn on O2 sensors you may not need...

You really need to start listening Girlbear.

Replace that O sensor and do a tuneup including:

Fuel filter
Spark plugs AC Delco Platinum only
Cap & Rotor
Air Filter
PCV Valve
dont get me wrong. I have all that stuff. And I cleared my whole day for the tune up starting at 9am tomarrow. Im staying in tonight. No drinkin. So I can be sharp for it. I just dont understand how it seems fixed. i just got in from driving and it is still fine?????????????

here they be. I read the other thread were the guy was havin same sort of issues and MAF sensor was answer. I must add that When I reset the memory by disconnecting the po+ cable to battery. She ran real good. I was thinkin about reseting it again. or will that just make things worse?
http://img98.imageshack.us/img98/5421/scanimage0010mf.jpg

no no no no NO NO no. DO NOT I repeat DO NOT disconnect the posative battery cable. If unhooking a battery, always unhook the negative first, and reconnect the negative last. You dont want the wrench to touch ground when unhooking the + pos cable. Always unhook the nagative. Please. You may think its not important, but if it happened to you once, you would learn fast. I had a buddy short circuit a battery straight across the terminals with a wrench, and I am not kidding you, sparks flew to the heavens, and that wrench got so hot, it melted to the battery, I thought it was going to blow up. But anways, just do a tuneup like everyone says. Plugs, wires, fuel filter, air filter, (I dont know what year yours is), and check the distributer and rotor if it has one.

dont get me wrong. I have all that stuff. And I cleared my whole day for the tune up starting at 9am tomarrow. Im staying in tonight. No drinkin. So I can be sharp for it. I just dont understand how it seems fixed. i just got in from driving and it is still fine?????????????


I'll be honest. If it were me I probally wouldn't do anything unless it happened again. Might have been some bad gas or peice of dirt in the injector. But since you already have all the stuff for the tune-up it would not hurt to do it. But I would no replace the O2 sensors just yet unless you have repeat codes from them.

agreed !!!


I'll be honest. If it were me I probally wouldn't do anything unless it happened again. Might have been some bad gas or peice of dirt in the injector. But since you already have all the stuff for the tune-up it would not hurt to do it. But I would no replace the O2 sensors just yet unless you have repeat codes from them.

That is pure laziness.

Sure she needs to replace the Passenger manifold O2 sensor, but saying she shouldn't do anything other than that even though she is in need of a tuneup is just you guys pushing pure laziness and sticking your head in the sand.

Telling people to not properly tuneup their engine is ridiculous and the random misfire could be from the lack of a tuneup.

crossing your fingers and hoping it will go away is just someone that is too lazy to keep their engine in perfect running order and wants other people to follow their poor thought out ways to make them feel better.

Girlbear, replace the sensor and do a full tuneup. Get that nice blazer working and firing like it should be.

To everyone else, shame on you.

That is pure laziness.

Sure she needs to replace the Passenger manifold O2 sensor, but saying she shouldn't do anything other than that even though she is in need of a tuneup is just you guys pushing pure laziness and sticking your head in the sand.

Telling people to not properly tuneup their engine is ridiculous and the random misfire could be from the lack of a tuneup.

crossing your fingers and hoping it will go away is just someone that is too lazy to keep their engine in perfect running order and wants other people to follow their poor thought out ways to make them feel better.

Girlbear, replace the sensor and do a full tuneup. Get that nice blazer working and firing like it should be.

To everyone else, shame on you.

Actually I said it would not hurt to do the tune up since she already bought the stuff. I would not replace the O2 sensor just yet because it needing a tune up might have been what set the sensor codes off to start with and it was just doing its job. I would do the tune up and then replace the sensor only after another code from it after the tuneup. I would not really call it being lazy not wanting to spend 50.00 that could be much used elsewhere to replace a part that is not needed.

Actually I said it would not hurt to do the tune up since she already bought the stuff. I would not replace the O2 sensor just yet because it needing a tune up might have been what set the sensor codes off to start with and it was just doing its job. I would do the tune up and then replace the sensor only after another code from it after the tuneup. I would not really call it being lazy not wanting to spend 50.00 that could be much used elsewhere to replace a part that is not needed.

No, the codes are showing a complete O2 sensor failure. This is something that won't be solved with a tuneup, only a replacement.

Even though I disagreed with BlazerLT's comments earlier in this post I "DO" agree with him now. I had very similiar issues, check engine light, running like shit, few hundread miles later and some fuel injector cleaner, back to normal. Few weeks later bang same things, fuel injector cleaner and gone again running fine. Month later same issues arrise. Basically what I was doing was using a bandaiding the real issues and getting my truck to run fine for a short while. Change what needs to be changed and fix what needs to be fix so you don't take the chance of damaging anything else or causing more issues down the line. Good luck girlbear.

BlazerLT has a money tree. I think economics has to sometimes play in to your automotive maintenance strategy.

BlazerLT has a money tree. I think economics has to sometimes play in to your automotive maintenance strategy.

You don't get it do you, NOT doing proper tuneup and maintanence will COST YOU MORE IN THE LONG RUN.

Being smart about keeping my truck up to snuff has saved me literally thousands of dollars.

New oil Filter, MAF sensor . Oil, 1st plug and wire. No prob. 2nd the porcalin shaft broke and then it took me and my sister 4hrs to remove the rest of that plug breaking numorous parts in the process. The heat sheild that goes over the headers GONE! The Clips that hold the wires in place all but 2 GONE!! but man she has her Balls back. "SERVICE ENGINE SOON" is still on and After the aggravation I went thru today trying to get the Broken plug out. I was inches from imploding. At this point Im just waiting a nuther whole month to save up the Cheese to have Her fixed the right way. by a pro. I am fed up. I've washed my hands of her so to speak. Aaah I'll probably give it a nuther go in a few days. I need to calm down. Now my Big question how dangerous is it not to have that heat sheild. It was just a thin peice of Tin like thing. Not even sure if it was a sheild. But reguardless its gone.

Did you change out your TPS?

I had problems like the ones you described and it was a TPS...

Paulson, you don't even know the problem so don't post a aimless solution.

Girlbear, did you replace the O2 sensor?

Thread merged.

Girlbear, don't start another thread on the same subject. Post in your existing threads.

Threads have been merged.

Paulson, you don't even know the problem so don't post a aimless solution.

Girlbear, did you replace the O2 sensor?I had already read her problems in this original thread.

I had a broken TPS that would cause sputtering and whatnot...

All she'd have to do is take the TPS off and see if it moved very freely... it'd be an easy test.

It probably isn't the TPS but it could be a possibility... never know.

I had already read her problems in this original thread.

I had a broken TPS that would cause sputtering and whatnot...

All she'd have to do is take the TPS off and see if it moved very freely... it'd be an easy test.

It probably isn't the TPS but it could be a possibility... never know.

That will give a code. She didn't have a TPS code, she had a random misfire and a B2S1 O2 sensor failure.

You don't just tell people to replace random sensors when you don't even know what the problem is.

Figure the cause of the problem, THEN help with the solution.

Did you remember to remove the battery cable for awhile so the computer will reset? I know it gave the O2 sensor fail code when you had it scanned so if it keeps up you will need a O2 sensor like LT has been saying. I just don't like to replace parts until I know 100% that they are bad and the code was not caused by something else. After all it did not hurt anything at all to do the tuneup first and still if you still had the O2 sensor failure code.

The O2 sensor code would be a system too rich code if it was a tuneup problem.

Having the switching, heater and other O2 sensor condition fail is a hardware failure, not something it sensed.

After reading some of the posts in this thread I was wondering what kind of fuel injector cleaner you people are using? Every time I use it, my blazer runs like crap for a few days. And no apparent differance in the over all performance after engine started running right. No SES lights or anything but it runs like I got half the plug wires removed. I finally did find 1 fuel injecton cleaner I can use. Funny thing is I got it from the local Toyota dealership. Its called 44K. Cost me $16 a can but all the others made my engine run crappy.

After reading some of the posts in this thread I was wondering what kind of fuel injector cleaner you people are using? Every time I use it, my blazer runs like crap for a few days. And no apparent differance in the over all performance after engine started running right. No SES lights or anything but it runs like I got half the plug wires removed. I finally did find 1 fuel injecton cleaner I can use. Funny thing is I got it from the local Toyota dealership. Its called 44K. Cost me $16 a can but all the others made my engine run crappy.I actually initially use GUMOUT. But I then on second tank of gas used Dura-Lube. now SES is gone. im going to Advance Auto in about an hour to re-run codes. Ill post'em for you guys.The only concern now is The sheild for the headers. with out it not sure if my wires will melt or more serious catch on fire. on the other hand what do you do when you put on after market headers. Horsepower TV (http://www.spiketv.com/shows/series/index.jhtml?seriesID=138) Car and Driver (http://www.spiketv.com/shows/series/index.jhtml?seriesID=145)Trucks! (http://www.spiketv.com/shows/series/index.jhtml?seriesID=152)Xtreme 4x4 (http://www.spiketv.com/shows/series/index.jhtml?seriesID=14223&refID=xtreme4x4)
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I watch all those shows never seen any one worry about header heat sheild. Am I too paranoid? or is this a major concern. I have precious cargo 65% of the time. My 16 month old Nephew. Just want to be 100% safe.

you say the heat shield is gone? Was it broken off, or just not put back on? If you went to a junkyard and got a replacement, would you be able to just bolt it on? I myself dont think its really that big of a deal. I've seen plug wires take a beating before, just make sure they are routed away from the motor, and not tied to or touching anything hot. You should be fine. I would however go to the parts store and get some of those plug wire organizer things, (for lack of a better term) and kind of keep it routed halfways decent. Also when you did a tuneup, did you check out that throttle bore? Get some carb cleaner and a toothbrush, block the throttle open, and spray it wath carb cleaner, wipe it off with the toothbrush, and rince it with carb cleaner again. I know this wont help your O2 sensor code, but usually people overlook the intake throttle plates when doing a tuneup, and if it doesnt completly close because of carbon buildup, you have a high idle and sometimes hard starting. Ok, on to your O2 sensor. Just do your car a favor and give it what it wants. please just replace it, dont be lazy. I wouldnt even go back to autozone to have the codes read, just change it, doing a tuneup wont make the o2 sensor miraculously start working again. Just a little reference for the future, when repairing your car due to fault codes, you always address the 1st one first, usually its the most urgent. I agree with BlazerLT, replace what is broken, if your holding off till the light comes on again, your probably losing gas milage. Just my two cents worth.

I'd re-set the computer and wait til the service engine soon light comes on and then take it to get scanned. I've seen more times then one where false codes appear, and from speaking to my buddy that owns a garage he says its a common thing. Clear it once and check it twice then replace. Just remember electronics you CANT RETURN. So if your wrong your out $$.