Syncing cams to crank

[Rocketst]

Where to next?

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[MagnetiseST]

Are you only getting misses on 2 & 3?

 

[Rocketst]

Exclusively. The misses on 1 and 4 are sympathetic

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[Rocketst]

And I've actually ordered a brand new set of plugs and spark plugs. This didn't fix the issue. I noticed an improvement but not a solution.

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[MagnetiseST]

Swap the coils from 2 -> 1 and 3 -> 4 see if the misfires follow.

I find it hard to believe that with the cams installed incorrectly or the engine off time that only two cylinders miss. They should all be missing.

 

[Rocketst]

Sorry I meant to say coils instead of plugs. I've done this test already but ordered new coils anyways and installed. Like I said problem got better but no solution.

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[Rocketst]

The next step I did was ordered a brand new fuel rail and new injectors and this also helped but no solution.

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[MagnetiseST]

Sorry I meant to say coils instead of plugs. I've done this test already but ordered new coils anyways and installed. Like I said problem got better but no solution.

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If it got better, it would lead me to believe you have an ignition issue. Unfortunately without one of those gigantic scan tools you cant really test it.

 

[Rocketst]

Yeah and even when I took it to a local shop to view the car driving in mode 6 the tech who was with me left confused as hell cuz nothing looked out of the norm... Lol he actually told me if I find out the issue to tell him cuz he's never seen anything like this.

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[Rocketst]

Nothing looked out of the norm except that on cyl 2 and 3 I collectively had 500 misfires in 10 seconds....

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[MagnetiseST]

You could have a bad ground or a bad pcm. A short in the wire harness somewhere.

 

[Rocketst]

Can I use the accessport to test frp and determine if the lpfp is to blame?

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[Rocketst]

So one of the things that mechanic did when I took it in to repair the engine was to verify I had a good pcm by unmating the accessport and updating the pcm. So I know I have a good pcm.

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[Rocketst]

What grounds could be the culprit?

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[MagnetiseST]

You could do that, but if it were the LPFP all cylinders would misfire. Did you change the HPFP cam bucket when you put this engine in? Did it come with an HPFP? or did you swap yours over?

 

[Rocketst]

I swapped my hpfp in but I ordered a brand new cam tappet to go in.

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[MagnetiseST]

I'd say thats good. Monitor FRP on the AP and see if its weird. But 500miss in 10 seconds is 50miss per second. If you measure that vs rpm thats a LOT of misfires.

Assuming is a spark miss:

800rpm idle = 800rev/60sec. 1 spark per every 2 complete revolutions, 400spark/60sec. 400/60 = 6.66666, 6.66 spark per second. 10 seconds should be 66.6 spark per cylinder.

 

[Rocketst]

What grounds should I be looking at?

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[MagnetiseST]

What grounds should I be looking at?

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http://www.nicksmustangranch.com/Service_Manuals/2014/2014_Fiesta/Wiring Diagrams.htm

Take a look through the wiring diagrams. I'm not sure where the PCM / ignition system grounds.

 

[Rocketst]

I'd say thats good. Monitor FRP on the AP and see if its weird. But 500miss in 10 seconds is 50miss per second. If you measure that vs rpm thats a LOT of misfires.

Assuming is a spark miss:

800rpm idle = 800rev/60sec. 1 spark per every 2 complete revolutions, 400spark/60sec. 400/60 = 6.66666, 6.66 spark per second. 10 seconds should be 66.6 spark per cylinder.

That's under load at a sustained 4k rpm which was and still is a problem area (rpm wise).

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