Erratic Idle/Stall only in gear
#1
Erratic Idle/Stall only in gear
Been fighting a strange idle issue on my 88 with the 5.8. Only when it's up to running temp while in gear it idles really rough when I stop at a light and sometimes dies if I don't tap the throttle in time. It will idle fine all day in park or nuetral. No one at my shop can figure it out. I've cleaned the IAC first then replaced it, TPS range is fine, MAP is fine, fuel filter is new, tune up, O2 voltage is switching, no codes, injector service, no vacuum leaks, fuel 32-35 psi @ idle, hell I even dragged out the Sun machine to check the KV's.
The thing that really grinds my gears is it doesn't do it all the time ecspeially when I pull it in the shop.
Any ideas?
The thing that really grinds my gears is it doesn't do it all the time ecspeially when I pull it in the shop.
Any ideas?
#3
I've used up two cans of TB cleaner all over and no change. By any chance could the fuel tank selector cause an issue? I wish I could put a noid light on all the injectors.
#4
Senior Member
Might check your battery leads - especially the grounds. Try replacing with 4 guage wire, including the one from the neg post to the front core support. It will also help to add one from the negative post to one of the throttle body bolts.
My truck was having similar issues, and this worked like a miracle.
My truck was having similar issues, and this worked like a miracle.
#5
Might check your battery leads - especially the grounds. Try replacing with 4 guage wire, including the one from the neg post to the front core support. It will also help to add one from the negative post to one of the throttle body bolts.
My truck was having similar issues, and this worked like a miracle.
My truck was having similar issues, and this worked like a miracle.
Worth a shot. and I thought I've seen your truck before. I live in Liberty also.
#6
Senior Member
Really?!?!? It's not blue/silver anymore - completely primered black in the past couple of months. ...started fixing some rust that develops under all of that trim, and ended up just going around the whole damned truck!
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#8
well the idle has gotten a small amount better after further inspection of the fuel filter. The great ford tech that installed it for the previous owner crushed one side of it some how? I blew through it and sure as sh** it was fubar.
I don't think my fuel pressure is an issue. Runs an average of 33 psi @ idle when 30-45 psi is whats recommended. The high pressure pump has been change but I have had a bad pump right out of the box (Airtex)
Gonna rule out the cats here shortly with a set of shorties and true duals.
I don't think my fuel pressure is an issue. Runs an average of 33 psi @ idle when 30-45 psi is whats recommended. The high pressure pump has been change but I have had a bad pump right out of the box (Airtex)
Gonna rule out the cats here shortly with a set of shorties and true duals.
#9
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well the idle has gotten a small amount better after further inspection of the fuel filter. The great ford tech that installed it for the previous owner crushed one side of it some how? I blew through it and sure as sh** it was fubar.
I don't think my fuel pressure is an issue. Runs an average of 33 psi @ idle when 30-45 psi is whats recommended. The high pressure pump has been change but I have had a bad pump right out of the box (Airtex)
Gonna rule out the cats here shortly with a set of shorties and true duals.
I don't think my fuel pressure is an issue. Runs an average of 33 psi @ idle when 30-45 psi is whats recommended. The high pressure pump has been change but I have had a bad pump right out of the box (Airtex)
Gonna rule out the cats here shortly with a set of shorties and true duals.
Last edited by ymeski56; 10-28-2010 at 08:25 PM.