89 F150 4.9l with broken knock sensor.
#1
89 F150 4.9l with broken knock sensor.
The whole thing started with it running rough and at idol was surging up and down. Anyway after replacing the pcv, idol control and all plugs, wires along with the throttle control I still had same problem after each one. Drained the tank and new fuel filter also. Was going to see if I could remove the knock sensor next and as I was unplugging it, it just disintegrated. Have checked junk yards (no 89 150's at this time) and all auto parts stores and even Ford (obsolete). Anyone know if it's possible to bypass it? Because it won't start now..
#2
You might not need to replace it: https://www.ford-trucks.com/forums/1...8-4-9-six.html edit: https://www.ford-trucks.com/forums/1...it-sensor.html
#5
You might not need to replace it: https://www.ford-trucks.com/forums/1...8-4-9-six.html edit: https://www.ford-trucks.com/forums/1...it-sensor.html
#6
Does it crank but not fire? Or does it not crank at all?
Did you possible disconnect something from the distributor / coil / TFI module that are located near the knock sensor?
I'd start by verifying that you have spark since you were doing stuff near the distributor.
#7
Trending Topics
#9
Here's a link to some tests you can do to figure out why the truck won't start: Part 1 -How to Troubleshoot a No Start (Ford 4.9L, 5.0L, 5.8L).
Additional tests you can perform to pinpoint issues: Part 1 -Ford 4.9L, 5.0L, 5.8L Index of Articles
Hope this helps
Thread
Thread Starter
Forum
Replies
Last Post
bartlettf150
1987 - 1996 F150 & Larger F-Series Trucks
7
05-22-2015 09:10 AM