code 45 or code 4 and 5?

[bodace40s]

I have a 92 S10 blazer 4.3L W 4x4 CPI...Its been doin good since I put a fuel filter,starter and I cleaned the IAC and IAT..NOW its back to not idlin at a stop and I have cold start..now when I go to start for first time it'll start like a firecracker! It was runnin great this mornin until the SES light came on..I gets to where I'm goin shut it off and restarted it and the SES light is off..I did the paper clip trick to get the codes..I got 4 flashes then 5 flashes..is this 45 or 4 and 5? I also had a smell comin out of vents(when in P idlin) that was like a sulfur or antifreeze smell like its hot..but its not hot.. Injectors? I HOPE NOT!!

Crystal

[blazer94]

It is code 45, which is o2 sensor indicating rich fuel. You should check your evap canister, which is probably located under your air cleaner housing. Split hoses, bad purge valve, disconnected hoses, cracked housing etc. will cause this. Determine the condition of these items and replace as needed. Check the canister,if fuel is leaking from it, replace it. There is also a test you can try to see if air passes thru, but you need a hand pump. The test is in the haynes book in the emissions control systems.You may also have to replace ( I would ) your O2 sensor AFTER checking / repairing /replacing the evap. canister. As for the odor coming thru vents, this condition causes gasoline odors to be smelled. You may want to check and make sure that the floorboard area on pass. side of vehicle is dry. A wet area could be the result of another common problem on old Blazers, the dreaded heater core.

[bodace40s]

Originally Posted by blazer94

It is code 45, which is o2 sensor indicating rich fuel. You should check your evap canister, which is probably located under your air cleaner housing. Split hoses, bad purge valve, disconnected hoses, cracked housing etc. will cause this. Determine the condition of these items and replace as needed. Check the canister,if fuel is leaking from it, replace it. There is also a test you can try to see if air passes thru, but you need a hand pump. The test is in the haynes book in the emissions control systems.You may also have to replace ( I would ) your O2 sensor AFTER checking / repairing /replacing the evap. canister. As for the odor coming thru vents, this condition causes gasoline odors to be smelled. You may want to check and make sure that the floorboard area on pass. side of vehicle is dry. A wet area could be the result of another common problem on old Blazers, the dreaded heater core.

ok..I gots me a haynes and it saids rich exhaust..check evaprative charcol canister and its componets for fuel and replace 02 sensor...I was hopin it wasn't the expensive sensor :-(...but gots ta do what I gots ta do! my floor isn't wet and I'm not losin water or heatin up..I've been through that before. I was thinkin the MAF but when I went to buy TB and a toothbrush I found out I don't have a MAF on my blazer and then this happened. Sorry fer yer troubles..I wrote this before I gots me a haynes. Thanks for your info.

Crystal

[bodace40s]

Originally Posted by bodace40s

ok..I gots me a haynes and it saids rich exhaust..check evaprative charcol canister and its componets for fuel and replace 02 sensor...I was hopin it wasn't the expensive sensor :-(...but gots ta do what I gots ta do! my floor isn't wet and I'm not losin water or heatin up..I've been through that before. I was thinkin the MAF but when I went to buy TB and a toothbrush I found out I don't have a MAF on my blazer and then this happened. Sorry fer yer troubles..I wrote this before I gots me a haynes. Thanks for your info.

Crystal

I just called for the $$$ of a o2 sensor..not bad..44.77 for my truck..thanks again.

Crystal

[blazee]

If the smell you are talking about is gas, that means that the oxygen sensor is doing it's job and detected it. Your sensor may be fine.

[blazer94]

Crystal, before you replace that sensor, don't forget to check out the canister. You gotta repair the problem before you replace the sensor, or it will happen again. Also, if you decide to replace the sensor, pull your ECM fuses with the key in the run position to clear the codes. Pulling the neg. battery cable will do this also, and let it sit 5 min or so before re-connecting. Also, remember that you have reset your idle by clearing the ecm, so put in in D with foot on brake and allow it to re-learn the idle, especially since you have hopefully corrected the rich mixture condition.

[bodace40s]

Originally Posted by blazer94

Crystal, before you replace that sensor, don't forget to check out the canister. You gotta repair the problem before you replace the sensor, or it will happen again. Also, after you replace the sensor, pull your ECM fuses with the key in the run position to clear the codes. Pulling the neg. battery cable will do this also, and let it sit 5 min or so before re-connecting. Also, remember that you have reset your idle by clearing the ecm, so put in in D with foot on brake and allow it to re-learn the idle, especially since you have hopefully corrected the rich mixture condition.

I'm not gettin a gas smell..its a sulfur like smell as if a battery would give..but I have a new battery...I've done the disconnectin of battery with whatever I'm into...you taught me that on here blazer94..lol..plus the paper clip..that was perdy darn cool. It seems like everytime I repair or clean stuff on my baby it runs great! THEN I'm right back at square one..drivin me crazy! I'll check my canister...thanks

Crystal

[blazer94]

well, look at it this way: Your only helping your baby out. It seems that way with my baby, too, but i just love her, and I enjoy doing the work to help her out. Plus, the knowlege on these fourms is great, I've learned ALOT of stuff here, and some of these folks are pretty incredible to take the time to share what they know / learned.

[bodace40s]

Originally Posted by blazer94

well, look at it this way: Your only helping your baby out. It seems that way with my baby, too, but i just love her, and I enjoy doing the work to help her out. Plus, the knowlege on these fourms is great, I've learned ALOT of stuff here, and some of these folks are pretty incredible to take the time to share what they know / learned.

OH me too!! I've been readin these threads for a week and I can't believe what I've learned! I have problems findin them the parts/sensors on the motor..but I fiqure it out one way or anudder..this is better than the books I've been readin..I do have anudder question...when I took my IAT off..I noticed the o-ring was a little worn..it rattled though..thats a good sign..I goes to the auto store to gets me anudder and he tells me they don't have em..he tells me to go to HARDWARE store!!! Whats with this picture?

Crystal

[bodace40s]

Originally Posted by bodace40s

OH me too!! I've been readin these threads for a week and I can't believe what I've learned! I have problems findin them the parts/sensors on the motor..but I fiqure it out one way or anudder..this is better than the books I've been readin..I do have anudder question...when I took my IAT off..I noticed the o-ring was a little worn..it rattled though..thats a good sign..I goes to the auto store to gets me anudder and he tells me they don't have em..he tells me to go to HARDWARE store!!! Whats with this picture?

Crystal

I'm sorry ..I meant my IAC..I'm sooooo confused with these sensors..the IAT rattled and my IAC needs a o-ring...sorry I'm learnin

Crystal

[BlazerLT]

This is NOT an O2 sensor problem, his cpi injector has ruptured and now needs replacement.

Sorry, but this is your problem.

[bodace40s]

Originally Posted by BlazerLT

This is NOT an O2 sensor problem, his cpi injector has ruptured and now needs replacement.

Sorry, but this is your problem.

My what? lol..oh my..doesn't sound good :-((...guess I'll gets my books out AGAIN! Oh and my last message I messed up again in my sensors...its my PCV that rattles not my IAT..I'll get it together here one of these days...also I'm a her not a his...my blazer's a her too..LOL..thanks for the info.

Crystal

[BlazerLT]

You will have to replace :

CPI Injector
Nut Kit (Internal Fuel Line Kit)
Upper plenum gasket.

[bodace40s]

Originally Posted by BlazerLT

You will have to replace :

CPI Injector
Nut Kit (Internal Fuel Line Kit)
Upper plenum gasket.

okie dokie...thank ya..

Crystal

[bodace40s]

Originally Posted by bodace40s

okie dokie...thank ya..

Crystal

Would placin the fuel regulator work? This seems the cheap way.

Crystal