frustrated HELP

[stroker/stonemaison]

As some of you well know I have been having some troubles with my truck it started with hard starting when cold changed relay with stancor relay tested agian and passed but only started fine when pluged in.
then it started to run rough and surged/loped
throws p1211 until warm replaced icp still no go notice amp guage doesnt drop any more when cycleing glow plugs JUST finished takeing off valve covers and check harnesses and all looks good buzz test WAS done when cold TWICE and passed,truck is stock othr than 4inch muffler cat delete wher should I go from here

[stroker/stonemaison]

bump bump bump

[stroker/stonemaison]

any one

[bigcountrysg]

Have you done a cylinder contribution test when the engine is cold. I bet you will have an injector fail when you the cylinder contribution test.

[stroker/stonemaison]

Originally Posted by bigcountrysg

Have you done a cylinder contribution test when the engine is cold. I bet you will have an injector fail when you the cylinder contribution test.

no I havnt how do you do that

[bigcountrysg]

Originally Posted by stroker/stonemaison

no I havnt how do you do that

You need a diagnostic tool. One that is capable of doing KOER tests.

What did you use for the injector buzz test.

[stroker/stonemaison]

Originally Posted by bigcountrysg

You need a diagnostic tool. One that is capable of doing KOER tests.

What did you use for the injector buzz test.

Ihad ford do the buzz test$600 later still not fixed so trying myself BUT Iknow just enough macanical stuff to be dangerous:

[bigcountrysg]

Originally Posted by stroker/stonemaison

Ihad ford do the buzz test$600 later still not fixed so trying myself BUT Iknow just enough macanical stuff to be dangerous:

The dealership did not do a cylinder contribution test when they did the buzz test. I am surprised they didn't do the test.

For the price you paid I would go back and see if they will do the test for free. It only takes about 5 minutes to do it.

If you were closer I would do it with my Auto Enginuity.

[stroker/stonemaison]

that price was for two hours labor they said oil can cause issues sothey did an oil change bill was $337 and then I bought a icp sensor of ebay$ 200 plus after payin duty cost ford wanted $300 plus tax and these guys will NEVER touch my truck again. and thanks for the info OH! and is it quite common for a buzz test to pass an acontrabution test to show a fail

[bigcountrysg]

Originally Posted by stroker/stonemaison

that price was for two hours labor they said oil can cause issues sothey did an oil change bill was $337 and then I bought a icp sensor of ebay$ 200 plus after payin duty cost ford wanted $300 plus tax and these guys will NEVER touch my truck again. and thanks for the info OH! and is it quite common for a buzz test to pass an acontrabution test to show a fail

Yes it is, the buzz test checks the electrical side of the injectors. All that can be working just fine. But the injector in itself could be bad.

My truck had the same problem you have. I took it to the dealer paid them an hour labor they did the buzz test called me and said it past the buzz test. They wanted another 500 dollars to check the wiring. I told them after speaking with Scuffy on here via the phone. I told the dealership to do a cylinder contribution test and not to worry about the wiring. Needless to say it came back #8 cylinder failed the cylinder contribution test. I picked the truck up and replaced the #8 injector problem solved.