HELP!! 87 Ranger running too rich. HELP!!!!!!! - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 08-29-2007
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Icon5 HELP!! 87 Ranger running too rich. HELP!!!!!!!

My 87 Ranger is running rich. I'm getting 12 mpg, and it barely runs. When you first start her up, she will stall 3 or 4 time, unless you keep your foot in the gas. Then when you’re driving, it likes to stall at traffic lights here and there. And she has no power going up hills. I checked the fuel placement sensor, the fuel pressure regulator, the O2 sensor, and the temp sending unit. They’re all OK.

so what could it be????
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Old 08-29-2007
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Timing belt jump a tooth?
Fuel injector stuck open.
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Old 08-29-2007
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check your Pcv hose. Mine was doing that and sure enough the hose sliped right off
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Old 08-29-2007
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Quote:
Originally Posted by OTRtech
Timing belt jump a tooth?
Fuel injector stuck open.
how do i check the Fuel injectors?




Quote:
Originally Posted by fletch12518
check your Pcv hose. Mine was doing that and sure enough the hose sliped right off
I'll check that later today.
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Old 08-29-2007
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i checked the Timing belt and it looks good and its still tight, checked the Pcv hose and it's hooked up and it has no cuts.

how can i check if the Timing belt jump a tooth with out tearing a part the front of the motor?
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Old 08-29-2007
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Quote:
Originally Posted by svo/ranger/stx
i checked the Timing belt and it looks good and its still tight,

how can i check if the Timing belt jump a tooth with out tearing a part the front of the motor?
How could you check the tension without pulling the cover off?
Answer:You can't.

How long since it was changed? Being twenty years old it should have been changed a couple times already. Also by now the tensioner is probably shot.
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Old 08-29-2007
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i got a new motor in 2003. it has 60,000 miles on the motor now.
the timing belt has never bin changed
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Old 08-29-2007
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Next you should check the Throttle position sensor.
Was this a crate engine or a rebuild ?
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Old 08-29-2007
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it was a JASPER crate engines
i repast the Throttle position sensor and the o2 sensor 7 mouths ago.
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Old 08-29-2007
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Okay I can't help myself here.

i repast the Throttle position sensor

Did you use paste ? epoxy works better

7 mouths ago.

Prolific son-of-a-gun aren't we ?

Well anyway
Is this thing throttle body injected ?
Crank position sensor ?
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Old 08-29-2007
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no its not throttle body injected.
i think it called multiport injection.

i got to check the Crank position sensor
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Old 08-29-2007
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i just call my friend up and he said it's not the crank position sensor. his dad said to check the MAP sensor. Could that be it?
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Old 08-29-2007
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DOH ! I forgot the older systems had those #$%&@ things.
Usually when those went bad the engine wouldn't even start.

I'm still leaning toward a bad injector as you said you need to open the throttle when starting.
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Old 08-29-2007
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well I'll check that out soon and I'll let you know how it went.
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Old 08-29-2007
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i was having the same problem with my 87 and i changed the ecu, map sensor, throttle postion sensor, o2 sensor, and a couple other sensor cant think of the names right now and it was still acting up
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Old 08-29-2007
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grate if i cant figure this out i going to switch it over to Carburetion
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Old 08-29-2007
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Could be something really simple like spark: fouled plugs, bad or slightly disconnected plug wires, bad cap/rotor... I'd start there. Make sure every cyl is getting a good spark and good clean plugs are attached.

Or air: make sure the air filter or air intake hose isn't clogged/blocked. Take the air filter out and then try to run it.

Other things: make sure a vacuum hose hasn't come off; check/reset your timing. Did they change/clean your injectors when they replaced the engine? Could try running some nasty injector cleaner through it. Theres some stuff called seafoam that people rave about, but I've never tried it.

Last edited by 07B2300; 08-29-2007 at 11:29 PM.
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Old 08-30-2007
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thats the first thing that i checked
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Old 09-01-2007
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My 94 2.3l acted like that and it was the coolant temperature sensor.
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Old 09-02-2007
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Get a Noid Light at the local auto parts store for a few bucks and check to see that each injector is firing repetitively. This is a device that plugs into the injector harness (in place of the injector) and has a simple test light on it.

Quote:
Originally Posted by Jubangy
My 94 2.3l acted like that and it was the coolant temperature sensor.
Whaaaaaaat??? What could the coolant temperature sensor have to do with moderating fuel delivery?
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Old 09-04-2007
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thank you I'll try that this weekend

Quote:
Originally Posted by Needforspeed3685
What could the coolant temperature sensor have to do with moderating fuel delivery?
you car need more fuel when its could. so if the coolant temperature sensor is not working right, say its reading that its could but its not it will run rich. but i replaced that, so i know thats not it.
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