I am having a problem my 87 TII pulses at like 500-700 when it is fully warmed up and has been ilding or driven for about 25 min or so. I have tried adjusting the tps and the idle adjust screw and neither of them seem to have fixed anything... does anyone have any ideas as to what may do this?

 

It is the TPS, try adjusting again at the ECU

 

^LOL I have the opposite problem. Mine starts smooth for about 10 seconds, then pulses UNTIL it warms up. Crazy Rx7's

 

i know when i switched my bov to a 1st gen dsm i had the same problem it pulsed but then i put a check valve in that top line it stopped it im not saying thats whats wrong with yours but check around all that stuff to look for some vac leaks

 

I agree on the vacuum leak. it only happens when the car is warm because things heat up and your vac hoses get softer. it might just be a split in the hose. if it pulses about 2 times a second it is *MOST LIKELY a vac leak.

*I stated nothing as a fact so no flaming.

jana,
TR

 

I'm about 75% in agreement with ICE, but I found that my BAC gave me a similiar pulse. Try checking the BAC also, advice also taken from the ICEMAN!

PEACE THE DOG

 

pulsing idle is almost always caused by a misadjusted TPS or BAC, no matter what the RPM or engine temp.

 

Well stated ICE, thanks again for the brew at the meet.

PEACE THE DOG