Gray wire is consistent between koeo and idle at 5 volts.
Ground is consistent
Pin c is moving between .5 and 2 volts randomly now with no movement in sensor or throttle. guess it's time to get another sensor and hope I don't break another bolt
'89 c1500 5.7 tbi with 700r4
Timing is set to 0
New sensors all around (truck sat for a long time)
Tps sensor is showing .49 volts with key on and not running, once it's started it jumps to 1.3-1.5 volts. Idles high around 1500-1700
When I pulled off the old sensor one of the bolt heads snapped...
1989 c1500 5.7 tbi
I’m fighting a high idle issue and I’ve sprayed carb cleaner all around the intake manifold, throttle body gasket, and all hoses under vacuum. I think the culprit is my PCV valve. I have a new one installed and it’s functioning properly. The stock hose has no leaks but at idle...
Thank you so much for the feedback! I think I may be able to get it soon and I’d love to be able to support a company that, as I’ve read, has such great customer support
I have a 89 c1500 with the 5.7 tbi and I want to get into tuning. This is my spare run around vehicle and I think it’s a decent platform to start considering it is all stock and I have replaced most all maintenance parts and it runs well. I’m debating between getting a chip burner or saving for...
Bought an injector spacer to be put on today and I may have found my issue. The injector housing wasn’t on tight and there was a gas leak around the regulator area. After the install I started it up and let it idle. No issues since
Injectors spray nice and evenly in a cone shape. It’s more of a random rough idle on start up. It happens sometimes when it’s a cold start. Has happened on a hot start. It idles down nicely unless of low on coolant, which I think is where the coolant isn’t properly reaching the CTS for the ECU...
Bought the truck with 150k and already driven it to 160k. So far I’ve been fighting a rough idle issue and have replaced
Fuel pump (stock unit)
Tpms sensor
IAC sensor
Coolant temp sensor (for ECU)
Distributor
Ignition coil
Plugs and wires
Spare tire
Rear shackles (0/2)
Exhaust (straight pipe)...
Heard about this website from reddit. I have an ‘89 c1500 5.7 Auto long bed. Bought it with 151k on it and a few issues, looking to fix it up a little to be a reliable truck to cruise around in.
Put in new rear light boards because my brake lights weren’t working and I had power coming to the rear. Rebuild the section of harness at the rear bumper. I don’t power with the parking light switch on in the rear, but the fronts come on. No torn wires under the dash that I’ve found, the...