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post #1 of 10 (permalink) Old 02-16-11, 08:35 AM Thread Starter
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1986 4 banger fuel injected loading up

My 1986 4 cylinder ranger when started runs at high idle for 1 minute or so then begins to load up ( just like a flooded carb) but just for a short time then straightens out and runs ok. when it loads up it blows black carbon out exhaust. This happens every time it is shut down and restarted no matter wether it's cold or hot.
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post #2 of 10 (permalink) Old 02-16-11, 09:45 AM
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Re: 1986 4 banger fuel injected loading up

An injector may be leaking. You could run injector cleaner through it. Try this too. Ford Fuel Injection » How To Run a Self-Test

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post #3 of 10 (permalink) Old 02-16-11, 02:48 PM
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Re: 1986 4 banger fuel injected loading up

could also be a fault o2 sensor causing wrong signal until it warms up.

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post #4 of 10 (permalink) Old 02-16-11, 03:22 PM
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Re: 1986 4 banger fuel injected loading up

Faulty engine coolant temp sensor also sending wrong info ?
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post #5 of 10 (permalink) Old 02-16-11, 03:35 PM
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Re: 1986 4 banger fuel injected loading up

yep rs just thinking that
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post #6 of 10 (permalink) Old 02-16-11, 04:19 PM
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Re: 1986 4 banger fuel injected loading up

What's that saying "great minds think alike " !!!!!!
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post #7 of 10 (permalink) Old 02-16-11, 04:23 PM
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Re: 1986 4 banger fuel injected loading up

years ago i had a falcon aussie one thats temp sensor was so bad it would run with no injectors because of the fuel fumes in the oil and inlet manifold it ran few 30 minutes at idle just on these fumes.


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post #8 of 10 (permalink) Old 02-22-11, 08:24 AM Thread Starter
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Re: 1986 4 banger fuel injected loading up

I had the oxygen sensor replaced --still same problem. Read codes--40 something-- or the code for excessively rich is all that it reads . I will check the temperature sensor although the gauge is working good.
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post #9 of 10 (permalink) Old 02-22-11, 11:01 AM
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Re: 1986 4 banger fuel injected loading up

The O2 sensor doesn't have any affect until the engine is very warm and the exhaust temp is high. The fuel pressure regulator could make it run rich too. What is the exact code you got?

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post #10 of 10 (permalink) Old 02-22-11, 12:31 PM
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Re: 1986 4 banger fuel injected loading up

Quote:
Originally Posted by R.S.LOGAN View Post
What's that saying "great minds think alike " !!!!!!
Ummmmm....... I think it's "sick minds think alike"...... just sayin'
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