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Old 03-16-2010, 11:06   #1 (permalink)
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I need some good Advice!!!


I need some good advice! I have an 89 E-150 w/ 302 EFI.

About a month ago I stopped at a store for about 5 min. When I came back to my van and started it, it was chugging & sputtering. After about 30 min of driving it cleared up and ran great. The next day, the same thing happened. This has gone on every day since...

So I tried running codes and the only code I got was for the Knock sensor.

Since then I have replaced the:
Fuel Filter,
Distributor Cap,
Rotor,
Plugs,
Plug wires,
coil pack,
Oxygen Sensor,
Ignition Module,
coolant temp sensor,
fuel pump,
EGR valve position sensor,
fuel pressure regulator,
throttle position sensor,
gas cap.

I also tried a new map sensor but when that didn’t work I took it back.

I removed the EGR inspected it, cleaned it, the diaphragm looks good and is moving freely..

I have dropped the gas tank, drained it and replaced with fresh gas.

I took the van to a muffler shop to look at the catalytic converters and was told they are ok.

There are No overheating problems and the oil and water look good (no signs of one in the other)

The Van actually runs fantastic most of the time. It seems to only act up after it is warm and has been shut off and then re-started OR when at idle for a long period of time (long stop light or traffic).

This is driving me NUTS! ... Any advice would be greatly appreciated!!
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Old 03-22-2010, 10:19   #2 (permalink)
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Re: I need some good Advice!!!

have you pulled the injectors out & turned the key to the on position as to prime the fuel system & see if there is any fuel drooling from the injectors, maybe a pintle hung open in the injector? I had a similar issue with my boat last summer that also runs ford power
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Old 04-04-2010, 19:06   #3 (permalink)
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Re: I need some good Advice!!!

A quick test to see if the problem can be narrowed down to a particular cylinder is to disconnect the wiring connector at the fuel injector...start with cylinder #1, then hook it back up and try #2, etc...shut the engine off before disconnecting the connectors or reconnecting them. The idle quality should decrease a little with one of the injectors unplugged - if it doesn't, then the problem is with that cylinder(s)...make sure you check them all, even if you get this result with one (you could have more than one cylinder that's not living up to its potential. This test will tell you a few things:

If you isolate the problem to a specific cylinder, the problem is with the individual injector (and/or wiring specific to that cylinder), the problem is with the ignition going to that cylinder (not as likely since you've replaced quite a bit of of the ignition system, or the problem is with the cylinder itself (a bad ring, valve seat, etc - mechanical parts can do funny things as they heat up and cool down).

I just realized this post is a few weeks old, but I figured since I went through the trouble of typing before checking the date that I might as well go ahead and post it...
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