here's my problem. when i start my car it idles around 900rpm for 4-5sec then jumps up to 1,500-2,000rpm depending on the day. ive replaced almost ALL the sensors and the computer isn't popping any codes. i have set, reset, and reset the timing, haven't been able to fnd any vacuum leaks. everything seems to be where it needs to. anyone have any ideas?


1986 T/A TPI 305

 

Has the idle screw on the throttle body been turned for some reason?

 

as far as i know it hasn't. i checked that by turning it a hair each way and it didn't change anything. i also just started having a problem getting the timing set. ive hand cranked the motor to top dead center. in the books it says to disconnect a plug but it doesn't show which one or where it is.

 

#1 plug
On a V8 - drivers side, front of engine
On a V6 - pasenger side, front of engine

 

this might sound kinda dumb,but is your gas peddle caught in the floor mat?

 

i dont have floor mats. i know which cylinder is #1. i'll reset everything and i can't get t to start. i just bought a computer-less distributor. im hoping that will fix my timing issue. as far as the idle are there any sensors that can be adjusted?

 

check the distributor rotor, cause i had a similar problem it was idling at about 1200 and it brought it down to about 550, i think it was that :S

 

You need to disconnect the EST connector to properly set your timing. IIRC, it's a tan single-wire connector, somewhere around the passenger side strut tower. If your timing is too high, it will cause a high idle, and it will ping under load.

Some other causes are improperly adjusted idle stop-screw, as well as incorrect TPS setting, if you have an adjustable TPS sensor.