1994 Ford Ranger Engine Stalling

AILLYIA

MEMBER
1994 FORD RANGER
6 CYL
2WD
AUTOMATIC
173,000 MILES

The engine is stalling after about 20/30 minutes of stop and go driving when I am sitting at idle at a light or stop sign. If I shift into neutral it doesn't stall, but will sometimes stall immediately when braking to a stop. It runs fine when the engine is cold. It has recently had a full tune up, plugs, wires, cap, rotor and several other things done related to a rough idle which helped but the mechanic thought it may have a cracked head. Also had the water pump replaced within the last couple of weeks and a pulley was loose. The truck ran and idled a lot better after that work was done. I've seen similar threads and was thinking it may be the Fuel pump relay?

Thanks

5 Replies

MERLIN2021

MECHANIC
17,250 POSTS

If the check engine light is on, read the codes Jump the two termnals shown together and turn key to "ON" and count the flashes... a 22 will flash as 2 flashes then a short pause, then 2 flashes, if more than one code is stored, the pause will be longer. The codes will display three times and end with 11 or 111. Write them down and post here. First do this with the key on engine off, then again with it running.

Have the 02 sensors ever been changed? It's way over the 100,000 mile liftime of the sensors...and they come online when the motor is warmed up.

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Thursday, February 4th, 2010 AT 2:13 AM

AILLYIA

MEMBER
3 POSTS

The check engine light hasn't come on. I checked with the previous owner and he doesn't recall replacing the O2 sensor. I bought it from him with 105,000 I haven't replaced them since I purchased it.

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Thursday, February 4th, 2010 AT 4:44 PM

MERLIN2021

MECHANIC
17,250 POSTS

02's could be a problem, and so could the ECT(engine coolant temp) sensor. May want to test fuel pressure, not so much the relay..
https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.
https://www.2carpros.com/affiliate/uid/merlin2021_1
Tools available here!
And this:
Get a can of spray Throttle body cleaner, start the car and spray around, pay attention to vacuum lines and manifold, if the idle changes, you found a leak. You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
Keep the spray away from the exhuast manifolds...
The other possibilty is the idle air control, it,s bolted to the side of the throttle body...

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Thursday, February 4th, 2010 AT 6:48 PM

AILLYIA

MEMBER
3 POSTS

I checked everything and came up with nothing so I broke down and took it to a garage. The distributor was worn out. I had it replaced and problem solved. Thanks for your help.

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Tuesday, February 9th, 2010 AT 1:21 PM

MERLIN2021