metalhead1

91 305 TPI sat for several years. I have replaced lots of new parts: Plugs, wires, coil, cap/rotor, fuel injectors, all engine sensors, fuel pump unit (did best I could to clean gas tank), fuel filter, fuel pressure regulator, egr, cleaned out plenum.
When engine is cold, it idles and runs runs fine. But once it starts to warm up, it looses all power on any acceleration, even slight.
Tried a new distributor, no change. No check engine light.
HELP!!

mcgarnicle

iTrader: (14)

Looks like you've changed all of the typical heat related items, (distributor, ign. coil, injectors, pump)


When it's warm does it still idle good, or does it also get worse along with loss of power? Does it run rich once warm? Sounds to be a closed loop issue probably MAF or O2 sensor related.

metalhead1

when warm, still idles good. Don't know if it is rich or lean.

mcgarnicle

iTrader: (14)

I'm thinking O2 sensor just because it being a closed loop issue, and all those other pieces being replaced. Where the replaced items new or used? Was the O2 sensor included with all the engine sensors?

navy02ws6

Have you verified that the base timing is set correctly?

metalhead1

All replaced things were new. O2 sensor will not budge, I'm afraid I might break it. I was going to disconnect the air injection pipe on driver side and see if that affects anything (thinking a clogged cat?)


Timing, I have not. Would not think that would change by sitting there.

Pro

Put away the parts canon lol and put some heat on the O2 sensor then turn it. Actually before that get some scan data and see what the ECM is hearing. With all of the money you have spent on parts you could have gotten a little scan tool with live data to help out.