rising rpm's

[snakebite01]

i installed msd cap, rotor, accel plugs and wires and msd 6al box. it's a 92 gt and sometimes when i'm in neutral or park my rpm's will start to climb up to about 1500 and sometimes close to 2000. i also cleanded my maf with maf cleaner and i put in a new throttle position sensor...


any ideas of what could be causing this to happen??

 

[BlownFiveLiter]

It could be any number of things. Check out jrichker's Surging Idle Checklist for a step-by-step list of fixes for idle issues.

 

[putnam88]

bad tps

 

[5.0Droptop]

vac leaks can cause this also.

 

[putnam88]

i didnt think vacuum at idel would make it rise

 

[5.0Droptop]

Go out and start your car and pull off a small vac line and see what happens.

 

[snakebite01]

i will check for leaks tomorrow and let you know what i come up with

 

[putnam88]

lol i know well on my car and on my stang when i did a intake swap i forgot a vacuum line and it wouldnt run then i put it on and it ran then pulled it and it stalled

 

[snakebite01]

do you think that the two vac lines that were hooked up to my smog could be causing it?? i plugged them off with screws lol...