pacepony

i finally got my alternator to charge, but now when you push the gas it stumbles bad. it will idle ok but if you push the gas it wants to die. if you keep playing with the pedal it finally will rev and once you get it to the higher rpms it idles fine but if you let it go back to idle it does the same thing. i get one thing fixed and them something else happens.

pacepony

anybody??

birdman076

What year motor? MAF or SD? It could be any number of things.

settled4automatic

i've got that problem as an intermittent thing. does yours do it all the time?? mine will do it after it runs for a minute or so at idle on a cold start. it will sometimes do it at a stop light after its warm too. i was told vacuum leak, but i haven't found any yet. i sprayed throttle body cleaner all over my vacuum lines and under my upper intake (because i didn't want to take it off and get a new gasket). hope this helps at least a little :P

ho85GT

pace pony do u got a carb?

pacepony

its a 86 efi thats been converted to mass air. when you first start it up it runs fine for about 25 or 30 seconds and then it starts. it will still idle, rough but still idle but it wont rev. i bought it like this and im trying to get it on the street so its not just a sudden thing

pacepony

also, i took it down the road the other day and when i shifted into 4th and let out of the gas it died and didnt start back up until after about 20 mins and the pos side of the soleniod was hot but i believe thats another problem

stanglx2002

check the plug to the MAF and make sure it is connected all the way. i had that problem 2 weeks ago and i found out it was the plug to the MAF wasnt all the way plugged in bc the clip on the bottom of he MAF electronics was broken so the plug came out a little. i had to zip tie the plug together

86gt5.0HO

What you describe is a symptom of a TPS problem. Check it by taking a voltmeter and and conecting the black wire of the voltmeter DIRECTLY to your battery neg. Connect the red wire to the GREEN wire on the TPS (you will have to shave a bit of insulation off of the wire and then hold the volt meter probe onto it). While holding the probe to the green wire read the voltage, it should be .98 volts with the throttle closed and the key on. Get an assistant to slowly open the throttle all the way. As you watch the voltmeter it should increase in voltage evenly without jumps or flat spots. If the TPS fails the test its bad, get a new one.

When you get a new one, if you get a NAPA TPS, it will require you to use a file to shave some of the white metal off the intake mnfld.

GOOD LUCK

86HOGT

I don't think you want to "shave" the wire's insulation...get a paper clip to back probe. And the TPS suggestion, is a very good start.