1990 Ford F350 - Answered Questions & Fixed issues

Question edited for clarity. @Randall Andre. It wasn't answered because of the way the question was written back to front. Generally 14 year old questions don't get answered. It is better to write your own. In the link. https://www.google.com/search?q=1988+ford+econoline+e-350+ecm+location A Service Manual is always a good investment https://www.google.com/search?q=1988+ford+econoline+e-350+service+manual ..

as the engines are the same , it should fit straight in items to consider is the drive shaft slip joint size and spline numbers

Long shot, how about the air cleaner?

Yes, cracked manifold can let oxygen in, which tells the pcm to enrich the mixture. You are probably running rich. Really bad for gas mileage too. Replace the manifold.

Check 4 bad earth

It sound like a bearing issue. I would recommend checking oil pressure. This should be done both cold and hot. Allow engine to cool over night, you can get an inexpensive oil pressure tester at most parts stores. Remove the oil pressure sender near the oil filter. Attach the oil pressure tester to this port. Start and run engine. Cold oil pressure should ideally be around 40psi, with hot oil pressure around 20. If the pressure drops significantly or never really is satisfactory this may indicate a larger issue. It could have a bad or restricted oil filter. It could also have excessive clearance on the bearings, indicating wear and the need for new bearings.

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem. Best Manuals

The multi function switch is a string possibility.

Diesels do not have carburetors

governor pressure to high, possible causes governor is sticking high vacuum at modulator bad modulator engine rpm to high miss aligned lincage

They run on regular. Sometimes I put in midgrade every 3rd time I add gas.

Check auto choke fast idle,free up choke butterfly.

Most likely the IGN Module in the Distributer.. it is the thing that the wires are attached to under the distributer, usually gray in color.. could be the coil, could be not getting a 12v single from the ign switch to the coil.

It could well be the fuel pump. Or maybe a fuel filter. Replace the filter if easily accessible. Even if it is not easily accessible, you can get a gauge to check for sufficient fuel pressure. You will be working with gas at that point. Unless you are experienced working on cars and for your own safety, get a reputable mechanic to check the pressure.

That is kind of vague, but the most common thing to check is the tires, then the motor mounts.

Is the ignition switch position working? ====== Locate and check the fuel pump relay. Most relay fail after 160,000 miles. It is rare but it could happen.

Try to take it to a service station for complete service

Hello,Yes--the main computer is a possible culprit. You can really tell if the symptoms change from one time you start the vehicle to the next. e.g.-black smoke out the tail pipe. I had a computer problem once--I unplugged the water temp sensor and drove it--after a quarter mile it died and would not start. Weird things were happening like when driving at a steady speed there would be hesitations as if I were playing with the accelerator.I hope this helps.

If that is the case, you know the answerIt has to come out & be rebuilt or replacedand the trans has to be checked for debrisCould be a loose flywheel

Did you check to see if the blower motor had power and ground ?