When my truck sits for more then 8 hrs it smokes on start up for quite some time. It also runs rough until I give it a little to clear it out after that she smooths out and runs perfect. Its a white/blueish smoke. I'm fairly certain its raw fuel from the smell of it i even had a second opinion. Around the same time my oil consumption went up a little bit as well. So I am planning on doing injector o-rings. My question is If I have an injector stuck open how would I diagnose which one it is? Would a CCT notice that? I ran a CCT and it came up with #8 not contributing equally or out of balnce. I tried searching but the searches aren't bring up the results I'm looking for.

 

I think that's normal for 8 unless you have an hpx. Or so I am told. Couldn't you do a buzz text with an AE? That should tell you if its stuck.

 

I did a buzz test today and it has injector #2 open high to low. Would that cause it?? I don't have a hpx yet but its on the list and I finally have a job again so some of this stuff will start getting done.

 

I don't even know what that means sorry. Hopefully someone else will chime in and help you.

 

Thanks anyways. Could anyone explain to me to find out with injector is stuck open? I'm sure AE would be helpful I am working at a shop now and we do have a Genisys but I don't think its capable of eveerything AE is or I just haven't figured it out yet.

 

Open high to low is an electrical code from the IDM, when you perform Buzz test the IDM codes will be displayed, where as if you had just done a KOEO test it would have said p1316 which is "IDM codes detected" Likely causes for the high to low open is worn injector, weak solenoid, or UVCH or 42 pin connector issues.

 

What is KOEO? I have an AE but not good w it yet. Sorry for

 

KOEO Key on Engine Off................

I think I have the same thing with my, number 8. I have gone into the UVCH, swapped solenoids, and checked the 42pin for shorts. I am going to replace the injector and see if that cures the high low #8 and start up smoke.

 

If your injector was stuck open and dumping fuel then you would have a whole different set of symptoms. It's possible something is wrong on the oil side but it's hard to tell with just a buzz test.

IMO, the most practical thing to do now is pull the valve covers and look for anything obvious. Check out the valve cover harness to see if it's connected properly and also check for a burnt center pin as well. Then run a buzz test on a cold engine. Place your hand on the suspect injector solenoid and see if it vibrates the same as the others. A loose armature plate will vibrate very soft or not at all. If everything looks good, then start the engine while looking at the oil discharge from each of the injectors. They should appear to be equal volume. Check out the suspect injector and see if it's shooting oil at normal intervals or a constant flow.

My first thought was that you probably have a bad o-ring on one of your injectors but the high/low side fault code points to something on the electrical side. If so, you should be able to use an ohm meter to isolate the issue when you have the valve covers off.

 

I appreciate the advice I will be pulling my valve covers yet again. To explain my situation a little more. I replaced all 8 injectors about a year ago had multiple problems with the new uvch so I went to International and got another one and that solved my multiple idm codes. Fast forward a little about a month ago I started having a no start/long start/ idm codes again. I pulled my valve covers and checked the harness all looked good. I ohmed out all my injectors and all was good. I checked the 42 pin connector and didn't see anything out of the normal. I then pulled my IDM connector and ohmed thosed wires I needed too and all of those were within spec. I replaced my IDM and for a week and a half my truck was absolutely normal. Now I have IDM codes again and an intermittent long start again. I will once again pull my valve covers this weekend and check the flow and try swapping some solenoids and see if it follows the injector.

 

Weird thing today I let my truck sit all day today and started my truck not even a puff of smoke P1316 was gone drove home from work and about 10 miles into my drive P1316 is back.

 

P1316 is a classic UVCH indicator, as is the intermittent nature of the symptoms. Fairly easy to ohm the pins; check out the link below and search around to "bone up" then grab your voltmeter...

https://www.ford-trucks.com/forums/1...lp-please.html

Could also be the 42 pin wire harness chafing on the top of the VC. Mine had not worn thru, so I just cut some radiator hose and slipped it over to protect it.

Post back with the readings and we'll go from there.