hey guys I'm new to this site and the rotary scene just got an fc s5 that has some problems idling it is bouncing between 1500 and 2000 and when I start it sometimes idle drop so low it dies. the other problem that occurs is during acceleration it hesitates pretty bad but not always at same rpms just when ever I get on it a bit. could these problems be related and does any one have any ideas?

 

Typically a vacuum leak or bad/misadjusted TPS.

http://howto.globalvicinity.com/gv_w...i=58&co=1&vi=1

 

My 88 N/A vert has the same idling problem! but not everytime though. Tonight when I first started it cold, idle drops so low and it died, after restarted I gave a little gas but still bounces between 1500 to 2000 rpm. After I ran it and the car warmed up the idle problem is gone.....

Am I having the same vaccume leak problem?

thanks a lot

 

No doubt it... My 90 Vert does the samethinq... on a fresh start qive car a lil gas and the idle will bounce jus for a minute then soon as it warms up a little youre golden... Nothing really major...

 

First tps ajustement, second new spark plug and cable, third new O2 sensor and forth if the 3 other one dosent work, check for a vacuum leak

Good luck

Eric

 

Ignition coils, as well as spark plugs/wires

 

mine does the same thing.. i was told its the bac valve???
oh and what is the "tps" sensor?

 

whoa!!! sorry! ima a dumb ***! had to think for a sec... throttle positioning sensor DUH!!!! :p