Car won't idle on its own and whenver you try to rev it up it breaks up.

[allwheelTSI]

My car is running like CRAP!

It refuses to idle on its own it just dies, and whenver you try to rev it up it breaks up bad and blows black smoke like a diesel!

Yes, I've searched for hours, I've tried replacing the ECU, MAS, and the Fuel pressure regulator. Yes, I've done a leak down test and its holds pressure just fine. The car also has new plugs and wires and they are all in the right order aswell. I've also done a compression test and had good results.


The car is a 1990 Plymouth Laser Turbo.

 

[silver eclipse]

Could be many things.
Does sounds like a stuck fuel injector.
-Chad

 

[absolute_DSM]

Boost leak test.

 

[dsmdreamin]

boost leak test, then check the 02 sensor to make sure it doesnt think its at wot when at idle, had that happen on my dakota.

 

[allwheelTSI]

I have done a boost leak test. The O2 sensor is also just been replaced.

 

[silver eclipse]

Theres no boost at idle. Why jump to a boost leak test other than to find vacuum leaks?
Check your plugs and see if one is drenched in fuel.
-Chad

 

[steve]

Is it firing all all 4 cylinders?

Steve

 

[cantrun10s]

Had a similar problem when I first put mine together. It may sound stupid, but check your alternator. My car started fine, but had intermittent missing at idle, and would smoke and pop and do all sorts of weird things if you tried to touch the gas. Ended up being improper voltage supplied to various parts of the car due to a defected alternator. FFT.

 

[allwheelTSI]

Theres no boost at idle. Why jump to a boost leak test other than to find vacuum leaks?
Check your plugs and see if one is drenched in fuel.
-Chad

I think two and four were wet when I did the compression test.

 

[allwheelTSI]

Is it firing all all 4 cylinders?

Steve

Yeah, I don't know how strong the spark is, I have'nt put a meter on it or anything but I do have spark on all four cylinders. And from idle speed to 2k it seems to run on all four smoothly.

 

[allwheelTSI]

Don't kill me for bumping my own thread I'm trying to ask another question without starting a new thread.

Does any one know if a faulty TPS could cause this?