I have a 1989 F150 with a 5.9L 302 V8 EFi.My check engine light was flashing, not staying on, and when I hooked up the diagnostic computer, it said the ECT sensor was bad. So I replaced it, and the check engine light still flashes. Also, before I replaed the sensor, and still now, the temperature gauge does not work. Any ideas?
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Re: check engine light
I have had many F series trucks,,they all seem to suffer from bad grounds from the battery,,and between the engine and firewall, this usualy causes the ECM to have a fit once in a while. The cure for me many times,,was to install a heavier ground cable between the engine and the firewall,,,and also another ground cable between the negative side of the battery to the frame of the truck. Hope this helps you also.
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Hook it up to a code reader via OBDII for specifics. Tecnically, there is no reason to flash your ECM unless you are using another ECM from a parts car...for say a 1989 Chevy. This ECM was used on the 1989 S-10 truck with the 2.5L four cylinder, the ’89 Camaro with the 5.0L HO V8 and the ’89 Corvette with the 5.7L Tuned-Port V8 engine. The only difference (aside from the vehicle wiring harness pin population) was the PROM. The PROM contains the calibration software for the ECM. Another reason would be to bypass a security locked ECM like a 2001 Pontiac GT which was notorious for shutting off the fuel pump if the security chip in the key lost connection through switched power.
Dec 5, 2013 - Uploaded by Ghetto Wagon
I thought the parts when the engine was running would come out better, but its just too loud. ... How to set ...
This sounds like a vacuum leak. Look close at the intake for a pipe or a tube that may be missing a plug or an additional hook up. If you can get it to stay running with patting the gas peddle have some one spray wd40 around the manifold and when they get close to the leak the engine will rev up and smooth out. Hope this helps.
302 is a 5.0L v8 engine and 4.9 is a 300ci, 6 cylinder. so you may have problem with transmission, exhaust manifold, motor mounts, vacuum lines/hose, radiator, power steering pump, a/c system, and mostly wirings. not to mention there is a computer in those trucks!
10 degrees before top dead center
NOTE: Initial timing is measured with engine at normal operating temperature and Spark Output (SPOUT) connector disconnected or shorting bar removed.
rpm should be arrown 850
excuse the delay but been so busy