Fuel Injection Problem
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Freshman User
Joined: Oct 2005
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Fuel Injection Problem
I have a 1988, 351W, 4X4, pickup that I recently rebuilt the engine in. It runs fine at times and at other times, it idles very fast (approx 1800 rpm). I can hear like a solenoid clicks and then it runs fast. Sometimes the idle will fluctuate, and sometimes it idles fine. I have changed the computer, the temp sensor, air temp sensor, and the idle bypass valve. Still I have the same problems. Acts like a vacuum leak, but can't find it if it is there. Any help would be appreciated.
Thanks
Jim
Thanks
Jim
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Hello- Welcome to FTE! I have moved your post to the specialized forum we have here for your question. Check out the list of tech forums we have here. There is a wealth of information and expertise here to help you. There are a number of links in my sig below to help you also. Have fun! 
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Freshman User
Joined: Oct 2005
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I had the same idea, so I blocked the EGR valve off in an effort to rule it out. There was no change in the way it ran. I have sprayed WD40 and also tried water along the areas where I might have a leak. You should also know that I have removed the smog pump and all plumbing for it. Also plugged the holes in the back of the heads. The only vacuum I am running is for the power brakes, MAP sensor, heater, cruise, and the modulator valve on the transmission. All the vacuum solenoids are unplugged and have no vacuum going to them. I appreciate your help.
Thanks
Jim
Thanks
Jim
