1993 ford stalling

1993 ford explore with 162000 stalling when driving, changed the ide sensor and throtle position sensor stop stalling for about 1 week. engine just sounds loud whlie driving when i come to a stop it stalls but start back right away sometimes it drives right away sometimes i have to wait at least 10-15min before driving :banghead:

When the engine is running, does it run smoothly? Do you have a vacuum pump (such as a Mityvac) that you can use to test the EGR valve? Do you use fuel injector cleaner regularly? When was the last tune up performed (spark plugs, plug wires, fuel filter, air filter, etc.)?

-Rod

When the engine is running, does it run smoothly? Do you have a vacuum pump (such as a Mityvac) that you can use to test the EGR valve? Do you use fuel injector cleaner regularly? When was the last tune up performed (spark plugs, plug wires, fuel filter, air filter, etc.)?

-Rod

THE ENGINE RUNS QUITE WHEN IT RESTARTS ODBI ONLY CODE IS CYL ONE NSF. TUNE UP AND OIL CHANGED IN THE SUMMER

THE ENGINE RUNS QUITE WHEN IT RESTARTS ODBI ONLY CODE IS CYL ONE NSF. TUNE UP AND OIL CHANGED IN THE SUMMER

It's been a long day, what is the acronym "NSF?"

Did the tune up include all filters (check/replace) as well as the spark plugs and plug wires?

Have you examined the vacuum lines? I would expect the engine to run a bit rough if there is a vacuum leak, but worth checking anyway.

-Rod

can some one tell me the location of the computer

Generally, if the PCM is reporting meaningful codes, the PCM is not the issue. At least it should not be the first suspect.

What is NSF?

-Rod

nsf is insufficant. i changed ths massair flow sensor it run good of a day then started to the same thing also changed the crank sensor

You may want to check the throttle plate for a build-up of carbon on the back side of the plate. Maybe the carbon build-up is preventing sufficient air from making it past the throttle plate.

While you're inspecting the throttle plate, pull the Idle Air Control (IAC) valve and inspect the passages. If there is carbon build up in the passages or the valve, it may be restricting the air that bypasses the throttle plate at idle.

Another item to check is the operation and integrity of the Exhaust Gas Recirculation (EGR) system. If the EGR valve is not closing completely at idle, it can cause the engine to stall. One side of the EGR valve is connected to the exhaust manifold, and may explain why the engine gets "loud."

-Rod

cleaned the throttle body and installed a new IAC don't know where the egr valve is had auto zone check can seem to find it

I'm not very familiar with the engine in the 1993 Explorer, but the EGR valve will typically be mounted on or near the intake manifold. I'm guessing that the one on the 1993 is not electronic, so it will probably be round and rather flat with a vacuum hose going to the top of the "dish." The valve will probably be about 3 inches in diameter and is typically a chromate finished part (goldish in color). There will be a steel tube from the exhaust header connected to the underside of the EGR valve as well.

If your Explorer still has the underhood vacuum diagram, that may help you track it down as well.

-Rod

the egr is electronic what does this mean ?

Some EGR valves are electronically driven rather than actuated by vacuum. GM used electronically driven EGR valves earlier than most manufacturers. Ford used vacuum actuated valves where the vacuum was controlled by an electronic solenoid. This electronic solenoid is usually referred to as the Differential Pressure Feedback EGR (DPFE) solenoid and has been a common part on Fords to fail. I'm not sure if your 1993 would have this or not.

If the DPFE is not allowing the EGR valve to close completely when the engine comes to idle, that could cause the vehicle to stall. However, an EGR valve that is open when you attempt to start the vehicle should make it difficult to start the engine or keep it running.

-Rod

could it be the ignition module ?

could it be the ignition module ?

Yes, it could be the ignition module as well. Some of the local chain auto parts stores are able to test the ignition modules. I would not expect an ignition module though to allow the engine to start right back up and idle fine, but sometimes stall after a restart. Usually an ignition module failure will be a hard failure or a thermal issue that needs to cool down before working again.

You don't want to just start replacing parts that could cause this though, as by the time you find the real cause, you may have far exceeded what it would cost to have a professional properly diagnose the problem. You will of course gain experience and possibly satisfaction by just shotgunning parts though. It's your decision.

There are numerous parts/sensors that COULD cause the stalling. A good scan tool with a datastream mode and record capability could greatly aid in troubleshooting this issue.

How often does the stalling occur? Have you tried driving around with overdrive turned off to see if that prevents the stalling from occurring?

In your original post you mention that it starts right back up, sometimes you have to wait 10-15 minutes before driving away. The times that you need to wait, what happens when you try to drive away immediately? Does the engine just run rough and have little power, does it stall immediately? Have you monitored fuel pressure just after the engine stalls? Checked for spark? Checked the condition of the air filter?

-Rod

what could cause the truck to lose rmp ? the rmp drop low some time while driving

Are there any other symptoms, or are you just basing this on the tachometer reading in the instrument cluster? Does it only do this under certain conditions such as approaching a stop or when cruising on the highway, going uphill, etc.?

-Rod

Are there any other symptoms, or are you just basing this on the tachometer reading in the instrument cluster? Does it only do this under certain conditions such as approaching a stop or when cruising on the highway, going uphill, etc.?

-Rod
when approaching a stop and when driving at normal speed the tac drops below one less than half, someone told me that it could be the trany losing power

92 explorer acts like its running out of gas when it goes over bumps check engin lite comes on goes off as soon as it clears up

Welcome to the forum!

Since your Check Engine Light (CEL) has come on, there should be stored codes. On your pre-1996 Explorer, you can read the codes yourself with a paperclip. Check out the directions at http://autorepair.about.com/cs/troubleshooting/l/bl_dtcs_18a.htm, way at the bottom are the instructions on how to short the test connector to enable the CEL to display the codes.

-Rod