#4 Cylinder Failed CC Test
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Senior User
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From: CT
I just unpluged the main injector harness over the drivers valve cover and the cps. What would Ford consider spec for compression? I thought the #8 was low also #2 and #4 are borderline. I have 99,000 miles right now, im a little disappointed on these numbers, or am I just asking too much for a motor with 100k on the clock?
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by VQ2Fast4U
I just unpluged the main injector harness over the drivers valve cover and the cps. What would Ford consider spec for compression? I thought the #8 was low also #2 and #4 are borderline. I have 99,000 miles right now, im a little disappointed on these numbers, or am I just asking too much for a motor with 100k on the clock?
The compression numbers might be just due to the starter being sluggish from low batteries and it's cranking a little too slow.
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From: CT
I just replaced the batterys last week, and its turning over faster then it ever did. The reason I want to know if Ford would say compression is low and needs to be fixed, is because I have an aftermarket warranty thats over at 101,000 miles and if my motor is not healthy I want it to be taken care of under warranty. I just dont want to be kicking myself next year for letting this slide, and having to pull the motor myself.
Post Fiend
Joined: Feb 2006
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From: Middle Tennessee
You are averaging 360. The low is 87% of the high putting it within a 20% tolerance. I don't know what Ford's threshold is but I think for your mileage they wouldn't touch it. Seems to me the tech said something about 350 and up was going to be OK but don't quote me. Hopefully a tech will happen along and clear this up.
I know I would be reacting just like you on that low slug. I would definately get the other side checked and relook the low one. I'm sure that's on your agenda.
I know I would be reacting just like you on that low slug. I would definately get the other side checked and relook the low one. I'm sure that's on your agenda.
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Joined: Jun 2007
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From: Dothan, AL
I am new when it comes to working on diesels, but I just went through an engine change on my 01 PSD that I have owned less than a month. Mine was running worse when it was cold and/or idling. So after getting advice here on FTE I went back to the dealer to see if they would help me out since I just bought the thing from them. I did buy it "AS-IS". Per the diesel mechanic, there should be over 300#'s of compression on the lowside turning the motor over 5 revolutions. I had six cylinders that were around 400 and two that were around 180 and 190. I am not here stating that I know what the compression is suppose to be just stating what I have been told. I hope this helps.
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From: CT
Well my intermediate idle knock has now become all the time and very loud, I dont think its cackle. Now I have get an injector. I called my local International dealer for a price. $317 plus a $250 core charge, I couldnt belive it. It didnt sound like who I usually talk to so maybe ill go there in person and see if it changes. Any suggestions on where to buy one on-line? I sent an e-mail to RealDiesel seeing if they could overnight me an injector, but havent heard back. I dont know how reliable there shipping is, so I wanted to ask first and not get the run around.
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