Stutters when giving it throttle and won't accelerate.

[1995eclipse_]

I have a 1995 eclipse GST. I was driving around and it was running all good but after about 30 minutes of driving, when I would try to get on the throttle it would hesitate and stutter. If I ease into the throttle it's just fine, but if I initially give it anymore than 50% throttle it stutters and backfires and doesn't accelerate. My cel didn't come on when this began. It's on now because my oil pressure sensor wire get ripped off by a belt.

I've tried new spark plugs and wires. I have a new fuel filter on it, I've tried cleaning my MAF, I've unplugged the TPS and it still acted the same. I'm not sure what else it could be. I was thinking boost leak maybe? Any info would be great! Thanks!

 

[Chad1993]

To me it sounds like fuel delivery issues. Or air aka boost/vacuum leak.

 

[1995eclipse_]

So like a fuel pump?

 

[Chad1993]

Actually, I just experienced this last night. My front O2 sensor flat lined almost the whole time I drove it. If you have a logger, check for that. My front O2 is stock, my wideband is in the back of the exhaust. I could barely give it gas, and if I gave too much throttle it wouldn't take any gas in. Pretty much spit and sputter.

 

[steve]

I don't think a 2G will throw a CEL for oil pressure. Read the code and see what the ECU is complaining about. It might be simple, like you had the MAF or TPS disconnected when the ECU was on.

 

[1995eclipse_]

I don't have a logger. Also I reset the ECU and no more CEL! Is there any other way for me to check the O2 sensor?

 

[PrimerPLus]

Could be bad coils, bad transistor, boost leaks, clogged fuel injectors, bad fuel pressure regulator,

If you unplug your o2 sensor and it runs good, then you have a bad o2 sensor.

But if it was running fine and then you got on the throttle and it started doing that I would start off with making sure you have no boost leaks.

 

[1995eclipse_]

Okay, I'll go get a BLT done! Thank you guys!