rough idle t100 3.0
#1
rough idle t100 3.0
Hi i am new to this site and already have a question. I am working on a 1993 t100 3.0 and about 3 months ago i replaced the water pump and bypass tube. A couple of days ago this truck started to have a rough idle and when in gear it feels as if the truck iss going to die. I found that the throttle position sensor was bad and replaced it but did not help. I then pinched the fuel pressure regulator line off and the truck started running smooth so i replaced the regulator and it still has a rough idle. I can still pinch off the regulator line and it runs smooth. I hhave replaced the plugs and see no signs of water and it doesnt overheat. Has anyone had this problem.
Mark
Mark
#2
Check the vacuum lines and deadend caps if there are any. Also clean the MAF as the A/F ratio may be off if there is an issue with the MAFand when you pinch the fuel regulator line you are adjusting it and making it run smoother, thus I would be inclined to say it is something to do with air.
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montanatruck
86-95 Trucks & 4Runners
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02-26-2017 07:07 AM