Electrical Troubles
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Electrical Troubles
I own a 1987 F-150 2-wheel drive with an inline six and manual transmission(4-speed,actually a three with a granny gear)I purchased the truck new in '87 and currently have a little over 88K miles on it. A couple of years after I bought it I jump started a man and have had problems ever since. I had to replace the alternator,battery, starting relay just to name a few. I have not been able to pass the emissions test for the last several years,if I spend $200 trying to fix it they'll give me a wavier to get my tags renewed. Starting to get too expensive. The truck runs strong at higher RPM's. It has a miss at lower revs and is noticeable when driving around 35 to 45mph. I have had the timing checked and reset on several occasions but no help. Local Ford dealer can't find anything wrong. I don't have much confidence in them, if it doesn't show up on their diagnostics they just quit looking. Is there a way to check the ignition module and could I have damaged the computer chip by jump starting someone? I apologize for the length of this message but I failed the emissions test again yesterday. I hope to someday solve this problem and if anyone can offer advice I would greatly appreciate it. The part of the emission test that I fail is the Hydrocarbons. Thank you in advance for any and all help.
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Electrical Troubles
I was wondering if any one tried a new MAP sensor on your truck ? Another concern would be the TPS or it's adjustment.Both of these sensors tell the computer the load of your engine and adjusts fuel/spark accordingly.Also, you may try a new coolant temp sensor {not the guage sendor} to insure a good fuel to air ratio while idling which could be your e-test problem.
Phillip
Phillip
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Electrical Troubles
I have had a new MAP and TPS installed for almost a year with no improvement in performance or emissions. Truck has been in the shop this week and a scan showed the EGR control solenoid was defective. I wasn't surprised since I have been driving for a year with that vac. lined plugged with a golf tee.
Waiting on parts at the moment. Could the EGR valve make that big a difference in the emissions readings? If this doesn't help is there a way to check the ECM itself?
Waiting on parts at the moment. Could the EGR valve make that big a difference in the emissions readings? If this doesn't help is there a way to check the ECM itself?
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Joined: Jun 1999
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Electrical Troubles
You bet it'll throw off a reading,especially if the tech juices the throttle a couple of times to see what happens to the readings. depending on the design itself,some will open on there own at a certain backpressure in the exhaust,but all are designed to be closed off at idle{no vacuum applied}You may solve your "miss" problem after you get the EGR system working properly because these things you just can't plug up on a fuel injected vehicle.
phillip
phillip
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