just wont run right!!!!! 2001 cylinder 4 misfire

[bradw18]

i just remembered when i was looking at the title on that car it said it was a v6.... i dont know if somebody switched vins or what on that car. theres no dout about it the ls's are very nice cars hell thers about a thousand just in my town alone there everywhere...

[danielsatur]

Maybe they forgot to switch the ECU's from V6 to V8 & not tell anyone!

[34Ford]

Well Im getting p0307, 0171, and 0153 heavy misfiring, and some rattling noise.

Is the compression test the best way to check if a chain has jumped?

Whats the best tester for these hemi heads?

[danielsatur]

Are you the new owner of this car?
If not, how many miles are on this car?

A rattling noise could indicate a bad secondary cam chain tensioner, noisy cam followers, or amplified broken parts of a catalytic converter.

A compression test is the best way to tell, if the cam to cam timing is off.

I would focus on Bank2 (cylinders 4-7) on drivers side 1st.

P0307 - Misfire on cylinder 7
P0171 - Lean code
P0153 - Oxygen sensor on bank 2

1) When you pull the COP's on bank2, lable them 4,5,6, and 7.
2) Do a visual inspection for water, or oil contamination.
The only evidence of water contamination is rust on the spark plug, or rubber COP boot.
3) Do a visual inspection on Spark plugs 4-7, and look close @ 7.
4) Do a compression test on all cylinders 4-7.
5) If compression is good on all four cylinders, clean the COP's, and connectors with CRC electric cleaner.
6) Roll COP # 7 with COP # 4.

Note - All 3-DTC's could be a bad COP #7.

[shorod]

I don't think I'd jump to the coil yet. P0153 doesn't necessarily suggest that the O2 sensor is the problem. The possible causes for this code are as follows: contaminated HO2S, exhaust leaks, shorted/open wiring, improper fueling, MAF sensor, deteriorating HO2S sensor, or inlet air leaks. As you can see, many of these issues could be due to a lean condition on bank 2. Likewise, the P0171 code indicates bank 1 is running too lean. A bad coil will cause unburned fuel to get in the exhaust. This would not yield a lean code, but rather a rich code. A misfire can be due to an improper quantity of fuel as well.

It's worth swapping the coil from cylinder #7 to another cylinder to see if the misfire code follows the coil. I'd take it a step further and swap the spark plug from cylinder #7 with yet another cylinder. On the V8 it's not too bad to swap coils and plugs in case the misfire follows the spark plug. If it remains on cylinder #7 then I'd suspect the fuel injector.

I'd also suggest cleaning the MAF sensor and carefully inspecting the vacuum lines. Is there a chance the rattling you're hearing is due to an exhaust leak? Does it seem more pronounced on one side of the engine bay than the other?

-Rod

[34Ford]

I will have to ask the wife how may miles are on it this evening but she has had it for several years.
Might can tell by how far back I have been posting on here.

I swapped the coils earlier on #7 and no change.
It however fixed the p0103 I had by changing it.

I did put in new spark plugs on bank 2 and it got worse.
I dont think its a exhaust leak, I think the sound I here is due to it loping so hard at idle.
Been so cold here lately I haven't had a chance to go over it with my ear up close.

But I thought I would buy a compression tester. Do I need one with a hose on it? I figure that is what it would take to reach that far unless they make one with a loooong rubber tip.

[danielsatur]

You can borrow a compression testor from any Auto Parts store for a small deposit.

1) Try to isolate noise to bank 1 (cylinders 1-4), or bank 2 (cylinders 5-8).
2) A Local muffler shop can do a back pressure test on your catalytic converters.

Physical cylinder assignment-
Tran
4 8
3 7
2 6
1 5
FAN

The Lincoln LS & Jaguar S type are like bad sisters!

see http://www.automotiveforums.com/vbul...d.php?t=954555

[shorod]

Any chance your wife just put bad fuel in it, like 87 octane or something?

-Rod

[34Ford]

Originally Posted by shorod

Any chance your wife just put bad fuel in it, like 87 octane or something?

-Rod

Rod,

I wished.

This has been a problem longer than that. Found a tester on amazon I may buy.
Only reason I want to check compression is so I dont spend money on injectors and cant return them if their not the problem.
Will try to do a ear test this weekend.

God I hate winter.

[danielsatur]

It can't hurt to put some octane boost in the tank!

If you have Injector problems, you can do a ''Out of car Injector service''
any local diesel shop can micro bath, blow out, test flow rate, and put new injector seals on for $20-$25 per injector.

Just because you got a signal, clicking sound, or resistance doesn't tell me that the flow rate is good.

You could try rolling the injector, if bad, just do the cleaning on the one injector.

I have taken known bad injectors for a good cleaning, and they were good.

[34Ford]

Saturday just for the hell of it I took the first 3 injector connectors off on the drivers side and it didn't make any difference in the missing.

Put in a new fuel filter while I had the time.

But is there a way to have my injectors cleaned if I remove them? Is that a dealer job, or a local mechanic?

EDIT: Well Ill be, there is a ton of videos on cleaning them yourself. Looks simple enough.

[danielsatur]

Any local diesel shop can clean bad injectors.

[34Ford]

Wonder if these are worth the money? OTC -7448 Fuel Injector Cleaner.

Theres videos of it in action on youtube.

http://www.amazon.com/OTC-7448-Fuel-.../dp/B0002SR60W

[34Ford]

You gotta listen to this this thing rattle. Now remember this is happening while its missing like the dickens.

http://www.youtube.com/watch?v=rBxY0iJ_Tu0

[shorod]

Yeah, something's definitely not right. I guess you should first confirm the rattle is not in one of the belt pulleys, but since you also have a misfire, chances are good the rattle is related. Hopefully it's not due to a lack of compression.

-Rod