20 Most Recent
1990 Ford F250 Questions & Answers
Emissions level HC (PPM) too high in truck. How to fix?
Do an oil change with 20W50 oil (or one grade higher) to prevent blow by during the test.
You current oil has HC from blow by though the rings.
Do a fresh oil change will lower the HC.
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Change spark plugs,wires,cap and rotor if they are over 24,000 miles
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Make the smog check appointment for the EARLY MORNING. Colder air will help the fuel burn better.
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Clean or change the air filter and pcv valve.
Clean Mass Air Flow sensor with CRC Mass Air flow cleaner or electronic part cleaner.
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Do a quick wipe down on the wires and cap to take the moisture off.
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Check spark plug wire contacts for corrosion.
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Fill the tank to around 3/4.......just in case your fuel pump is weak.
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Ran the truck for 20+ minutes on highway before the test.
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Do not carry excessive cargo on the truck bed.
These are the little things I would do to get the HC and CO down.
Please post more information on the comment window.
1998 gmc jimmy steering measurements
The first thing to do is to have your alignment checked again. Wear on the inside edge usually points to an excessive negative camber problem caused by a bent suspension component or something like a worn ball joint. In some cases it can be caused by excessive toe out.
Alignment shop will be able to diagnose what is causing the neg camber.
Throwing parts at it is not a good idea could be just one part or multiple parts acting together. That's why a reputable alignment shop is in order.
Power steering leak
I believe there is an o-ring on that fitting that should have been replaced. Was that done?
Any Idea's ?
It half sounds like a problem with the safety switch for the starter lockout. On a stick shift it may be on the clutch pedal but is on the brake pedal for automatics. This assures that your foot is on the brake pedal so the vehicle does not lurch when you start it.
This would show up in the restarting process, but it is intended to lock out the starter and would not interfere with an engine that is already running. So to keep the engine running feathering would not have anything to do with the starter lockout.
MY 1990 F250 5.8 LITER
For your age truck, the system had an earlier diagnostic setup. The scanners that read it are not very expensive and such a scanner may reveal the problems.
In your case, some of the issues may be a reaction to the failure to start because there are automatic shut-offs when one part of the system fails. The crankshaft sensor for example controls the volume of fuel by regulating pressure for a given RPM and it okays spark for the engine. So nothing is wrong with the fuel system or the coil, but each is controlled by the crankshaft sensor.
This is why a spray of starting fluid may make the engine run on ether and bypass the automatic shutdown of the fuel system. The engine RPM's may reboot the ignition system.
You can sometimes borrow testing tools from the major autoparts stores. I was also going to say that a stuck thermostat sensor can make an engine too lean to start, but you indicated no fire at coil and you would have ignition power no matter what the temperature sensor indicated.
Check out youtube videos about the crankshaft sensor. Get a scanner for your age of truck, it may save you money.
I havea 1990 f 250. It was running stalled out
Did you check the battery or the ground wires why would put all that in the truck.the computer has to be the right one wow.goodluck parts chaser.you would have safed a lot of money taking it to a shop to diao it man wow ha.
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