I think you are right on the money with cam timing. have done two recently with flogged cambelt crank sprocket, although quite obvious due to noise from front of engine, only way to positively confirm is to dismantle & check, worth time spent IMO.
mechnificent,
Aug 31, 5:46pm
No codes! Freeze frames! if the problem is at full throttle then it won't have been the o2, they are ignored at full throttle. if it is loosing spark it should be running rich and the O2 should probably still show that even though the reading isn't being used in the calculations, if you are monitoring it dirctly it will defiantly show it, and, if there is unburnt fuel going down the exhaust the catalytic converter will start to over heat within a minute or less and the cat light will come on. just keep pushing it even though it's missing and see if the cat light comes on.
My guess from the symptoms is a blocked exhaust. hydraulic lifters pumping up. a mechanical fault rather than electrical or fuel per se.
beart0y,
Aug 31, 5:56pm
Fuel pump and/orpressure regulator. What is the fuel pressure at speed!
bigfatmat1,
Aug 31, 6:16pm
was running real bad when came in. I replaced plugs first point of call. I checked the o2 while hot at idle and was slow in reacting this was fixed with new o2 I have no doubt this was a fault with the vehicle but not the cause of the fault I am chasing.
bigfatmat1,
Aug 31, 6:18pm
To fat to walk down the hill I have work in the morn Ian. Ill drive down
mechnificent,
Sep 1, 6:06am
Can you tell whether it's a misfire when you push it!A judder more than a smooth throttling of the system like a blocked exhaust would cause!
I don't actually know what that model is. four or six, year or anything else about it. I'm just going through the generic thought processes.
You know what us mechanics do in a situation like that. push it till it fails completely. haha.
beno,
Sep 3, 8:54pm
so have you fixed it yet!
sas777,
Sep 3, 9:37pm
That's what I want to know too. I like reading threads like this.
pico42,
Sep 4, 8:24am
Yes, I believe there is a known key way issue with some of these engines.
jinx317,
Sep 5, 5:53pm
COME ON MOFO WOT U FIND!
bigfatmat1,
Sep 5, 6:16pm
oh yep all fixed lol new ecu was hesitant to replace because have never had a ecu fail like that. especially a under load fault. this also fixed the idle fault which i still fail to understand as I put a scope on the stepper motor outputs and it was switching as expected. obviousley i got something wrong lesson learnt for next time.
jinx317,
Sep 5, 8:24pm
Wow, guessing your simplifying things a bit (as in diagnosis!) been there.
clanky,
Sep 5, 10:15pm
Try your temperature transmitter to the ECU (not the one for the gauge).
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