New Guy From NC... w/ Misfires and no idle

[averageguy]

Should I just say hi here and ask questions elsewhere?

Well, title pretty much says what is going on. I am getting a multiple cylinder random misfire on all cylinders. I also get a rough idle bounces between 400 and 600 out of gear and is very rough. Will cut off when coasting to a stop. Other times it will idle between 1000 and 2000 revving up and down. I am at a loss.

Here is the history
Car was running rough took it to a shop.

1: shop replaced O2 sensors

and informed me of a leak in the upper intake and that I had a bad ECM

2. I replaced the ECM
3. put in a new intake gasket
4. put in a new throttle body gasket
5. cleaned out the intake and the head(lots of residue)
6. fouled the plugs when I tried to restart the car (so I replaced the plugs)
7. new air filter
8. new fuel filter

FYI - last year the coil packs and the ICV were both replaced. When disconnecting the TPS, the car still does not idle properly.


Any help is much appreciated. Could there be some hose or something that is not connected properly from when I replaced the intake gasket? I can not find anything...

[witeshark]

I wouldn't rule out a bad TPS, and

[averageguy]

Is there a good way to test the TPS prior to replacing it?

Any other ideas?

[witeshark]

Maybe have a scan for codes.

[averageguy]

currently scanning every time the cel comes on and always misfires and that is all I wish I could correct the misfire and then worry about the erratic idle. WHat are the chances that they are related?

[witeshark]

Fairly high I'd say. Are you sure there are no leaks at all in the intake?

[averageguy]

Fairly confident there are no air leaks in the intake, I have replaced the elbow and all of the gaskets and I have done the carb cleaner test and do not get any changes to think it is sucking in any of the carb cleaner.

[averageguy]

Just tried disconnecting the MAF sensor plug and the idle smoothes out it is still missing but the idle is not fluctuating. Should I try cleaning the sensor again or is it a replacement thing?

Also tried disconnecting the TPS and that did not seem to make any difference, so what does that mean? I can not remember.

Thanks again for the help.

[witeshark]

The MAF may need just cleaning, but replacement might be a better idea.

[averageguy]

Tried the cleaning of the MAF again tonight and still not any better. I guess I will have to replace it, wish there were a way to know for sure that it was bad. Can a shop test the MAF?

[witeshark]

I believe so.