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  #1  
Old 02-18-2012, 07:45 AM
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can you tell low compression by starter drag

hello everyone i am hoping i can be helped out here i have a 2000 ford f350 with a 7.3 auto trans ...... i was driving down the highway about 6 months ago and it cut off on me i put a new fuel filter in it which i always keep a spare .. and it took a while but i was able to get it to fire up again with some starting fluid assit .... made it to the nearest truck stop and it started losing power and cut off has not ran since then. i saved up some money and brought it to a nearby diesel shop. they told me it needed a new starter ... i told them go ahead and replace but then they called back saying it needs a motor because there is very low compression in all of the driver side cyl.... i asked them if they went ahead and put the new starter on they said no.. that it isnt a starter dragging but it is cranking slow due to low compression can somebody please help the truck has 198k on the clock and has never left me stranded and always ran great
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Old 02-18-2012, 07:56 AM
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Starting fluid?
So far, everyone who has "diagnosed" the truck is a
If there was low compression, it'd be easier to crank.
Have you ever replaced the cam position sensor?
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Old 02-23-2012, 09:40 AM
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the cam sensor was replaced about two years ago at the dealer when it died on me but this was different it started losing power and then died but started up and when it died the second time is has not fired up since
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Old 02-24-2012, 11:40 AM
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If it has low compression, you need to find out why and rebuild. No band aids or quick fixes

Are you confident in their diagnosis? Did they give you the numbers?

I have a sneaky suspicion of a bad valve cover harness on one side and incompetent mechanics
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Old 02-24-2012, 12:19 PM
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i had the same exact problem with my super duty but i would never use ether>.< it turns out the plug on the inside of the valve cover gasket had come off and was only running on half the motor.. as for the starter throw it in and try and fix yourself the drive side valve cover is the easy side to take off.. keep us posted
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Old 02-24-2012, 07:49 PM
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Sound like you need a couple of quarters for those harnesses. Mechanics tryin to make some good money. Check the uvch first.

Sent from my ADR6350 using AutoGuide.com App
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Old 02-27-2012, 11:09 AM
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but would the harness cause low compression
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Old 02-27-2012, 11:52 AM
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Quote:
Originally Posted by redogg322 View Post
but would the harness cause low compression
Why do you think it's low compression? The "mechanic" said so? Did he pull glow plugs and test? Did he give numbers for each cylinder?

My Samsung SGH-I997 made me send this.

Last edited by jesilvas; 02-27-2012 at 04:42 PM.
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  #9  
Old 02-27-2012, 04:38 PM
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I see your in Evans Ga. That's just north of Augusta right, I work in Augusta everyday, I will just make sure to stay away from the diesel shops in Evans. Why do you think all the cylinders on the drivers side all of a sudden have low compression. I am no mechanic but that just don't sound right. I would get that truck home and listen to these guys, they will help you get it going.
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Old 02-28-2012, 08:15 AM
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Quote:
Originally Posted by jesilvas View Post
Why do you think it's low compression? The "mechanic" said so? Did he pull glow plugs and test? Did he give numbers for each cylinder?

My Samsung SGH-I997 made me send this.
the shop said that they had another truck in there with the same problem and it had low compression so they did a compression check on it said that the first two cylinders had less then 10 lbs and the others wouldnt even register on the gauge .. what I dont understand is that the motor is cranking extremly slow even with full charge on brand new batteries with the charger hooked up.... would this give a false compression reading ? also would low compression cause it to crank slow? this is what i am being told by the shop .. I already have the truck back I just drop want to spend money on a motor if I am being mislead. Again thank you everyone for your help
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