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240 Running problem with 240T

8

8587turbo

Member
Joined
Dec 31, 2003
Location
Montana
Working on a 240 turbo that I towed home, it had a bad wiring harness . After repair it will fire & run if over 2500 rpm will not idle . The car sat for several years. The following work has been completed
1.fuel tank cleaned,new fuel pumps,new filter.
2.switched out fuel distributor , control fuel reg , new intake gasket, idle control valve switched out.

Nothing changed will start & if one can get above about 2500 it will run but if RPM's drop off it seems to have too much air & I have blocked off all of the vacuum ports on intake that would cause a leak. What am I missing? Any help would be great . Thanks
 
Rotted wiring harness is usually the culprit. What all did you repair? You didn't touch the vacuum system? That needs to be looked at with kjet. Stuck injectors. Etc.
 
Kjets On a Plane said:
Large vacuum/air leak?
Click to expand...

Yeah, that's what I was thinking but its all good, Harness should be good, was tested & metered when replaced , but have not checked injectors will head there next. Could any of the electronics be giving problem? I did switch out the idle control module on pass side under cpu with no results. I'm sure its something simple once found....good thing I have a running parts car. Thanks
 
Kjets On a Plane said:
Does the frequency valve buzz?

Crankcase vent hose come out of the air intake tube?
Click to expand...

Not sure if buzzing or not (dam hearing aids) that's one of the reasons I switched out completed fuel distributor section on top of air cleaner same results.. starts on cold start injector & if you can catch it & get some RPM's it will run above 2500. Sure sounds like too much air but its all buttoned up.This afternoon will check all hoses again for cracks, holes & disconnects.
 
8587turbo said:
Not sure if buzzing or not (dam hearing aids) that's one of the reasons I switched out completed fuel distributor section on top of air cleaner same results.. starts on cold start injector & if you can catch it & get some RPM's it will run above 2500. Sure sounds like too much air but its all buttoned up.This afternoon will check all hoses again for cracks, holes & disconnects.
Click to expand...



You can feel it buzz, even with a clattery redblock running next to it. Distinctive like a relay but obviously a lot faster buzz
 
tiredoldtommy said:
Injector seals? Mine did what yours does before I replaced all the injector seals.
Click to expand...

Pulled injectors this afternoon & seals are bad 2 were loose on injector & one was broken , I think that was problem. Any reason not to use M1 hi-temp grease when assembling injector with new "O" rings?

Thanks for all the help.
 
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