1994 ranger problems

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Sep 13, 2010 | 10:53 PM

#16

MrMikey64

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From: San Jacinto

No desire to hijack this thread, but since y'all are talking about spark....
I get an occasional Misfire #6 code from the computer. I've replaced plugs and wires. Am I now looking at coil, or should I consider fuel injector as source of problem?
As always, you guys definitely know your stuff!!!

Sep 14, 2010 | 03:01 PM

#17

1994rangerxl4x4

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From: Qualicum Beach BC Canada

i would do a spark test on the cylinder first to make sure your plug is sparking good. you can buy spark testers at any parts store fairly cheap. i paid $3 for mine.

what year is your truck? whats your drivetrain?

so on mine guys i replaced the pcm this time and still absolutely no change in the performance...

i am at wits end and have no idea where to go from here...

thanks
Lloyd

Sep 14, 2010 | 05:22 PM

#18

MrMikey64

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From: San Jacinto

Thanks! I will pick one up and try that. I'm running a 1995 XLT with a 3.0L V6.
Good luck with your issue!

Sep 14, 2010 | 06:17 PM

#19

1994rangerxl4x4

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From: Qualicum Beach BC Canada

doesn't your 3.0 still have a distributor and rotor style ignition??? if so i would also check out the cap and rotor for corrosion on the contact points... specifically number 6.

cheers

Sep 14, 2010 | 06:58 PM

#20

MrMikey64

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From: San Jacinto

Quote:

Originally Posted by 1994rangerxl4x4

doesn't your 3.0 still have a distributor and rotor style ignition??? if so i would also check out the cap and rotor for corrosion on the contact points... specifically number 6.

cheers

No siree - coil pack on top of the engine, and all the other sensors and solenoids - ain't tecnhology grand?!?!

Sep 14, 2010 | 07:24 PM

#21

1994rangerxl4x4

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From: Qualicum Beach BC Canada

yeah thats what i am fighting with right now.....give me a carb any day, lol..

there are tests you can do on the coil pack but for the 3.0 i am unsure...best bet would be to get a haynes manual.......

Sep 17, 2010 | 10:30 AM

#22

1994rangerxl4x4

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From: Qualicum Beach BC Canada

ok so i replaced the pcm, still no change.....i am ready to give up

Sep 17, 2010 | 11:05 AM

#23

pawpaw

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Joined: Jan 2004

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From: SW Va

Well lets think about this some more.

You say plugs 1 & 5, (which are paired together in the coilpack) wouldn't spark, unless the engine rpm was raised. All of the other plugs are firing ok..... Right???? If not, suspect a computer ground problem.

So if the other plugs are firing ok, again it would suggest a resistance problem somewhere between the coilpack & the computer.

You said you checked the continuity of the 1/5 wire from the computers firewall connector, to the coilpacks electrical connector, but you didn't post that you checked between the firewall connector & the computer.

So when you were replacing the computer, did you check the 1/5 coilpacks primary return wires resistance, between the computers electrical connector & the engine compartment/firewall connector????

Did you notice any corrosion, or maybe signs of broken wire strands under the wires insulation????

If you come to suspect that wires electrical soundness, you could try a parallel connection, between the suspect connectors & see if the 1/5 coil wakes up & makes a good spark at idle.

More thoughts for pondering.