Check engine light on corrigations

[HankyBoii]

Hey guys I've got a ZD30 series 3 patrol wagon and I keep getting the check engine light on the dash. I'm currently on my way up to Cape York, so as you can imagine, roads are pretty rough.

It only comes on after quite a bit of driving (2-3 hours) and typically on corrugated roads. Its not super consistent, but comes on when we're travelling between 60 - 80kmh.

When the check engine light comes on it reduces power and doesn't let me rev past 2000rpm.

If I shut the car off and turn it back on again, it goes away and usually takes 20-30 mins to come back on.

Things I've tried so far:
- Clean MAF
- Disconnect sensor at the base of fuel hand pump
- Filled up with fresh new fuel

Any ideas? Wish I had a scan tool with me 😅

[Brissieboy]

Scan it and see what codes show, otherwise you are just working blind.

[mudnut]

SCA or maybe autobarn, places like that sometimes let you scan the vehicle. Ring first and confirm, also lets them charge the unit before you get there.

[HankyBoii]

Got it scanned today

Code 77
P7-F INJ TIMG FB

Does that mean anything to you?

[mudnut]

Google search indicates fuel problems. Air in fuel, clogged filter wiring harness etc.

[HankyBoii]

I've done so many things but can't figure it out.

I've replaced fuel lines, replaced fuel filter, cleaned MAF, cleaned MAP sensor, checked for boost leaks / loose lines, took every connector apart and sprayed with contact cleaner etc..

Funny thing was I lost revs on the Tacho for a day or two but then it came back. I thought it may have been the crank angle sensor, but mechanic says it's fine.

Could this be a failing pump? Bad wiring? A sensor issue?

Any help would be great!

[jay see]

Injectors?

Sent from my Pixel 7 using Tapatalk

[Coldcomfort]

My old 2006 GU used to do the same thing. I was told its just the fuel in the filter getting shaken and aerated.... I never had any other issue.... From memory there is a fuel drain button on the Di ? That used to make it go away for a while.