Help please

[Fordman87]

Hi i made this to hopefully get some help, i have an 87, 2.9 automatic 2 wheel drive. Lately when i come to a stop in gear it tends to shut down. It idles very rough, i tried removing the pcv valve and it idles high but runs better without it. When i place it back in it kills the engine, i've replaced the valve but with either one the problem still occurs. Any ideas or help would be appreciated. Thank you

-Brennan

 

[pillen140]

when you open the oil fill cap does smoke or air pressure come out? could be blow by from bad rings.

 

[holyford86]

clean your idle air control.

 

[rangertotty]

I have a 87 ranger 2.9 auto... i had the same problem. all i did was cleen my entire intake from filter to plenum. my intake was full of crap. once i cleaned everything it run's great

 

[Fordman87]

i took the idle air control off and checked for blockage and i didnt find anything, so i adjusted the air intake and it idles fine now so ill see how things go

 

[holyford86]

the idle air control will stick sometimes, simply pulling it off and looking at it does not diagnose the problem, it could look absolutely fine and be bad, clean it and see if your idle speed improves, if it doesn't it may be fried. That screw on the throttle body is for setting the throttle position sensor baseline and should not be used to adjust the idle.

 

[Fordman87]

ok ill take it off again and clean it, but i adjusted it because the idle screw was completely backed away from the throttle arm

 

[holyford86]

well, now that you mention that, it would be a good idea to set the TPS baseline. Get yourself a digital volt meter, set it to 0-2 volts, backprobe the center wire at the TPS connector and ground the meter to the ground wire (black) wire at the TPS as well, with the key on engine off. set the voltage to 0.920-0.980 volts (0.935 works pretty good for me). Put loctite on the screw so it doesn't back out again.