kbjrx7@gmail.com

trying to get info on setting the twin TPS on a 91 which I think maybe the cause of the rough idle and running on my rebuilt engine. Also put a fuel pump form my dead 87 coupe into it last week so I'm getting a fuel pressure gauge tomorrow to check that is up to specs.

Aaron Cake

iTrader: (1)

Set the narrow range TPS in the same way as the S4 TPS is set. The full range TPS is "self setting".

kbjrx7@gmail.com

Hooked up the test lights. Hooked up the ground wire. Can hear the solenoids clicking as I move the throttle but can't get the test lights to light at all unless I check them on the battery. Never came across this one before... ..... any ideas
Adjusted the tps by the suck it and see method and got it running smooth but not perfect so thanks for you post Aaron

Aaron Cake

iTrader: (1)

Don't use a test light. Use the procedure in the Haynes manual to adjust the TPS to 1K resistance using an ohmmeter.

DrifterX

yup always thought the test light was right, turns out when i adjusted it using a multimeter what the test light was telling me was way off.