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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.

 
 
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Old 05-09-2011, 11:04 AM   #1
j0riakh1
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Default throttle/idle problems

i dirve an 86 gxl with a rebuilt, streetported s4 motor and a stock s5 turbo. all emmisions have been removed. it has a new fuel filter, 550cc primaries and 680cc secondariesadjustable fpr w jegs fuel pressure guage. secondary tb butterflies, fast idle cam have been removed. (i boutght the car all done up like this to learn about the engine, and already have something quick. bad idea).

the problem: i was driving on the interstate and my egi fuse under the hood kept blowing. ended up being a short in my fan wiring (clutch fan replaced with an efan). on the way back, the car spun a wheel bearing, the front driverside outer bearing to be exact. i have fixed the bearing, however, the engine will not hold an idle, and the throttle is very choppy when i accelerate. also it seems like its not getting as much boost, more than likely due to the lack of throttle. it also smells like its running VERY rich, i kno a rotary should run a little rich, but not this much. and i know, i need a wideband, but im trying to solve this first. my pockets are exactly as deep as the atlantic you know?

attempt at the solution: my friends with rotaries suggested i check the tps. and so i did. it should read about 1 ohm at rest, and about 6 at full throttle. it was about 2.63 at rest, so i adjusted the screw. it wasnt at 1 ohm untill the screw was almost all the way out. at full throttle it was 5.66. it feels a little better, but still sorta choppy and will not hold the idle. ive had a few people turn the screw at the throttle but no results. i checked for shorts somewhere but no luck there either.

If theres a certain sport i need to look or if someone knows of this problem please help me out. thank you.






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