95 Running like its on 3 cylinders.. - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 03-17-2010, 09:18 PM Thread Starter
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95 Running like its on 3 cylinders..

my 95 f250 with a 5 speed is running like its on 3 cylinders....

ive had it for 3 weeks now.. the first week i had it it did this 2 times...

i went out after work, truck was sitting unplugged in 30 degrees or below for 9 hours, i started it and the check engine light kicked on and it ran like **** for about 5-10 seconds and then the light kicked off and the truck was fine..

now this morning i went out and started the truck and it did the same thing, except the light wont turn off and the truck continues to run like ****. i check the oil, its fine, other than being like 150 miles overdue for a change (and im doing that this weekend). i start the truck back up and it does the same thing, let it run till it gets warm, light turns off truck runs fine.. heading to work it does it again and it has NO power. i floored it in 2nd and im pretty sure i could have run faster.

after work i go out, same thing. I went and filled the front tank up thinking maybe its just crappy fuel, changed the fuel filter and air filter, checked the oil again, and added some fuel stabilizer/injector cleaner... still running terrible..

the RPM stays right where it should, but it sounds and feels like it only has 3 cylinders... could this possibly just be because i need an oil change?

any help or reccomendations will be appreciated, thankyou in advance.
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post #2 of 4 Old 03-17-2010, 09:37 PM
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Under valve cover harness on one side or the other


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post #3 of 4 Old 03-18-2010, 05:26 PM
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yes,i agree with fordman,mine was doin same freakin thing,the fix is a sinch....not on the wallet though.if your truck is a 95 0r 96 then look at your valve covers you wil see two plugs on each valve cover,check to see if they are plugged in if they are then no prob there,remove the valve covers(and or injector covers) and check the plugs.. now this will be painfully evident when you see it.the plugs that i mentioned earlyier go inside the valve cover,when you lift the cover they will be melted and there lies your prob,one side is around 160 bucks for gasket and both plugs,now if you wanna pay someone to test and see wich side is bad then do so,but if you want to avoid the charge of a diagnostic check then takin em off yourself is the way to go,and dont worry,if you are mechanicly inclined then just watch how they come off and how the glow plug wires plug in
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post #4 of 4 Old 03-19-2010, 01:03 PM
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where is the plug ins outsise the valve covers specifically?? mine runs good, but it idles funny and kinda lopes...i was wonderin if this could be my problem... sorry to hijack ur thread. u prolly need new gasketys/wiring harness, i had mine changed and glowplugs and gp relay, and it was missin baaaaaad. so i took it bak and it needed new harnesses...the problem is that the gplug harness runs theru the valve cover gaskets

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