1995 RMS Hard to start when at operating temp

[Roadmonster]

hello everyone,
My sedan has 142k on it and runs great. It can be a little hard to start if it's been driven a couple hundred miles and has been at normal operating temp for a while . Fans are fine and the temp never goes more than 1/4 up the gauge. The car cranks fine, but normally it seems to take 2-3 separate cranks to get it to start. Sometimes it will barely catch and stutter for a few seconds before it comes up to idle. When it does this, it smells like it's running lean. The hot acrid smell. The car isn't throwing any codes. I've replaced the TPS, but nothing else. Any ideas if it might be EGR or O2 sensors? What should I check first?

Thanks!

[HotZ28]

Check fuel pressure first. O2 has nothing to do with starting. If the EGR is stuck open, it might be the problem. Have you scanned for DTC's?

[Roadmonster]

Thanks for the reply. First off, I'll admit my ignorance and ask what are DTC's?

The fuel pressure could be the culprit because sometimes it does this when it's cold as well, although not as ofter. I suspect it could even be a fuel filter too?

Am I correct that the lt1 has two EGR valves, one for each exhaust?

[HotZ28]

(DTC) Diagnostic Trouble Code is an electronic signal stored in an automotive computer, indicating the presence of a fault detected by that computer. This is more commonly referred to as a “code”. Fuel starvation caused by a clogged filter can also cause your symptom. The LT1 has only one EGR, however, they do have a pipe from each exhaust header feeding into one connection @ the EGR.

[Roadmonster]

Okay, now I'm with you on the DTC's. I have taken it to AutoZone and a tech college where they ran their OBD1 on it. I also checked the old fashioned way with the paperclip across the OBD ports. NO codes whatsoever.

I'll try a fuel filter tonight and see if that helps. With 142k miles, it can't hurt anyway.