5.8 with high idle.
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5.8 with high idle.
Hello, I have a 93 f150 that i recently did an engine swap from a 5.0 to a 5.8. For the rebuild on the 5.8 I put in a edelbrock performer EFI intake manifold, K&N air cleaner, and a comp cam performance camshaft. After all the initial getting it to run problems I have ran into one that has got me stumped. It now idles at roughly 1400 RPMs after it has come to normal temperature. When I start it cold it will idle at ~normal 700 RPMs. I've gone through as many threads as I could find and I've come up with this.
I have replaced these parts;
-TPS sensor
-Engine coolant temp sensor
-IAC sensor
I have also checked for these
-Vacuum leaks (eliminated all EGR components with the new engine)
-Ran with old 5.0 ECU, Same problem
-Cleaned old IAC and Throttle body
-Throttle cables in good working order
I havnt been able to pull codes yet. Lucky me, the check engine light has stopped working. Any other ideas on what could cause a high idle?
ECU compensating for camshaft?
MAP sensor?
Intake Air Temp sensor?
Thanks in advance.
I have replaced these parts;
-TPS sensor
-Engine coolant temp sensor
-IAC sensor
I have also checked for these
-Vacuum leaks (eliminated all EGR components with the new engine)
-Ran with old 5.0 ECU, Same problem
-Cleaned old IAC and Throttle body
-Throttle cables in good working order
I havnt been able to pull codes yet. Lucky me, the check engine light has stopped working. Any other ideas on what could cause a high idle?
ECU compensating for camshaft?
MAP sensor?
Intake Air Temp sensor?
Thanks in advance.
