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1991 Ford Ranger XLT 3.0 Liter


sando

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Has spark,fuel but still wont start.What gives?
 


Rearanger

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Also needs compression and timing.

Spark - What kind of spark?
Fuel - pressure tested or actually fuel in the cylinder.
 

RonD

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I would test for spark and fuel this way
Remove intake's air tube(large tube to air cleaner)
Open throttle and spray starting fluid into intake.
Try to start engine
If it fires up and then dies you have a fuel problem.
If it doesn't fire then you have a spark problem.

The 50/50 test, easy, fast and tells you alot
(testing for spark by pulling a spark plug wire tells you squat, works on single cylinder lawn mowers, or minibikes, lol)

If it fires up and dies, put air tube back on and unplug TPS(throttle position sensor), it is a 3 wire sensor on upper intake connected to throttle shaft.
Try to start, if it starts then you have a short in TPS or it's wiring that is shutting off fuel injectors.
get voltage meter to test TPS, do NOT just replace it, sensor rarely fail, 90% of all sensor replaced by DIYers were good, save your money and buy a volt/ohm meter.

If it doesn't fire then spark is the issue, 1991 3.0l has TFI ignition, TFI module on the side of distributor needs to be tested, read here: http://www.therangerstation.com/tech_library/TFI_Diagnostic.shtml
 
Last edited:

2trux

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Was anything changed before this no start condition started?
 

oolbreeze

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91 ranger custom 3.0

Hello
Sorry if I have come to the wrong forum. I have a bad PCM in my 91 ranger but have a 92 ranger with a good one same motor but XLT can they be switched strait up or is there something that needs to be done?
 

2trux

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It's always better to start a new thread. Adding your question to the bottom of an existing thread that has nothing to do with your question limits the responses you will get.
 
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