Engine Miss

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Mar 20, 2007 | 11:37 PM

Smokey1961

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Engine Miss

I have a 96 PSD that I bought last fall. Motor ended up being replaced because of water in oil. I had a shop put in a used 96 PSD with 165,000 miles on it. Has been running fine. I put a fuel pump on it couple three weeks ago due to it leaking out the weep hole. Ran fine for a couple weeks and now I have what I believe to be a miss on one cylinder. It is consistent from idle on up in the rpm range. How can I go about isolating which cylinder? I was a mechanic and still do some on the side but I have never been around a PSD at all. Can I pull valve covers and isolate a cylinder that way? Also been reading alot in the search function and was wondering if I pull a valve cover if there is a way to check the valve covers connectors? I would like to see if they are good or need replaced as they are too pricey to just put on for the heck of it. I am trying to learn as much as i can through the search function but it gets a little overwhelming reading about all the different suggestions. Thank you for any and all help it will be greatly appreciated.
Regards, Jeff

Mar 21, 2007 | 01:03 AM

bustech81

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on each vavle cover there is two plugs. unplug 1 at a time until your engine sound does not change. that will isolate two injectors. however, that better way to do it is to plug it in to a good scanner and run the cylinder contribution test. that will isolate 1 injector from the rest rather than two. Maybe be more specfic on your problem, someone might have a solution rather than injector. good luck.

Mar 21, 2007 | 07:54 AM

Smokey1961

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Thanks I will try that. If I find the plug in that has the miss I could swap one injector on that side with one from the other plug and see if it moves if it don't I know it's the other one. Is there anything special about moving an injector from one cylinder to another? Will it ruin o-rings or something else? I have never been in one so don't know whats in there.
Regards, Jeff

Mar 22, 2007 | 01:02 PM

14psd

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From: troy, Mo

Smokey try and find someone with a good scanner. The snap-on one works great. Most people don't own one cuz they are expensive. Some shops will do the engine test for you for little to no $. I bought the guy in town lunch and he scanned my truck. I told him what I was doing and he was willing to help. It shouldn't matter swapping injectors from hole to hole. But make sure you don't let a bunch of oil run down the hole where the injector goes in. You will hydrolock your engine! Thats bad. When I replace the bad injector on my truck I took a loong screw driver with a towel on it and placed it in the hole till I got the new injector in.

Mar 23, 2007 | 12:40 AM

BigCrzyRdNeck

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From: Crosby.Tx

i found my dead cylinder the first time by starting when cold like over night and touching each exhast pipe and found the only one that was not starting to warm up it wont be to hot to touch for aleast 5 minute of idling.

Mar 23, 2007 | 08:22 AM

Smokey1961

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Thanks for the replies am going to have a go at it this weekend. BigCrzy thanks for reminding me of that! I knew that,just didn't think about it. Thanks again and will post back when I find out something.
Regards, Jeff