First thing they are going to do is check the codes.
-
Help Support Hardline Crawlers :
Help! 1992 5.8 runs rough
- Thread starter Corey Y
- Start date
First thing they are going to do is check the codes.
zukkev
Cornfuzzled yet again...
I've got another question for you---is the engine original/stock, or rebuilt...if so<---what's been done to the engine? If someone has put a cam in it---may well be your problem...without custom (and potentially expensive) tuning, a cam in these engines will never work/operate properly!!!
The engine ran rough and had alot of miles on it so the owner had it rebuilt (stock) a couple years ago and it still ran rough. He has had a couple mechanics work on it but they could never get it running good, it has been sitting for about 6 months. He said if I cant get it running good he is going to sell it and buy something else.
Skid Mark
Well-Known Member
Since everything else has been checked or replaced Id say check replace the Idle speed solenoid
almost not done
Well-Known Member
it also could be a clog catalytic converter it will make the truck run like that if it were clogged.
zukkev
Cornfuzzled yet again...
Updates???
The EGR valve and selenoid was bad, so I replaced it with a new Ford part. It runs better now but has a surging idle about 300 rpm to 1000 rpm. At stoplights I have to put it in neutral so the idle smooths out. The starter was replaced yesterday and it is at Walts getting a new muffler today because it is rusted out and falling off. Does anyone know how to check the IAC valve/solenoid? It looks new but a chinese/taiwanese part.
This is super boring and drawn out, but shows the electrical test for a ford IAC at about the 4:20 mark.
http://www.wonderhowto.com/how-to-test-replace-cars-idle-air-control-motor-267188/
You can clean them out with carb cleaner, just keep the motor side up. :awesomework:
http://www.wonderhowto.com/how-to-test-replace-cars-idle-air-control-motor-267188/
You can clean them out with carb cleaner, just keep the motor side up. :awesomework:
zukkev
Cornfuzzled yet again...
Has any one checked the minimum idle? If not, check it, and make sure it's within spec... If so and it's ok, try and go through a relearn (disconnect battery neg, touch neg cable to positive for a few seconds, reconnect bat neg, then follow the relearn procedure from there(I don't remember the exact process)...
