jwaye2
Member
- Joined
- Nov 3, 2008
- Messages
- 317
- Reaction score
- 4
- Points
- 18
- Location
- Darwin
- Members Ride
- VZ SVZ, LN167 Turbo Hilux, VSII Ute
Hi Guys
I know there are a hundred posts about this and believe me ive spent days reading through them but I still haven't found a solution.
Got a VS V6 Auto Statesman that is difficult to start and runs rough. In idle it surges a little, ive revved it up to 4k and it struggles to get to 2k, it smooths out a bit after that and its barely noticeable but the surge is still there. Took it for a drive and even putting my foot down it struggled to get above 2k, may have gotten up there eventually but i ran out of street and didn't wanna push my luck on the main road. I can have it idling for 15 mins, turn it off and try start it again straight away and its just as difficult to start again, hot or cold makes no difference.
Ive checked every injector one by one and they are all working fine, I even put new ones in for good measure.
Every cylinder has strong spark, new coils, leads and plugs
All new filters and fresh fuel, also tested the fuel pump, and pressure reg
All new plenum seals, pcv and vacuum hoses
Got a VS ute that runs perfectly so I did a whole bunch of swapnostics on almost all of the sensors, including MAF
Tested and swapped every fuse and relay, including those not connected to the engine
Checked all plugs for good connections and broken wires
Even tried the spray water/carb cleaner trick all around the intake, manifolds, hoses etc to check for leaks
None of these have made any difference at all and to add to my problems to check for fault codes ive tried 2 different scan tools(one cheap, one professional), even purchased the Envyous Customs AED kit for my laptop and none of them can even detect the existence of an ECU, also tried the paperclip trick to check the engine light flashes and it come up with no codes but this may just be because it cant read the ECU. The weird part is the car does run and start so not sure why it cant read an ECU, surely it wouldn't even turn over at all if it couldn't read it?
Thinking the ECU itself could be the obvious issue ive tried 3 ECU's with matching numbers and two BCM's and had the exact same problem with all of them. No communication and still runs and starts like crap. Ive even checked the Diagnostic plug pin by pin to make sure they all have a signal/earth/power.
The only sensors i haven't swapped yet are the Crank Angle, Cam Angle and Oxygen sensors, though ive unplugged the Oxygen sensors while its running and it made no difference where I thought it would. These are next to look at this weekend if i don't find something else to try.
This is my 6th VS V6 and its the first time ive ever encountered a problem I couldn't figure out, really running out of ideas so im looking for any out of the box thoughts that I may not have missed or not thought of.
Really appreciate if anyone can think of anything that can help.
I know there are a hundred posts about this and believe me ive spent days reading through them but I still haven't found a solution.
Got a VS V6 Auto Statesman that is difficult to start and runs rough. In idle it surges a little, ive revved it up to 4k and it struggles to get to 2k, it smooths out a bit after that and its barely noticeable but the surge is still there. Took it for a drive and even putting my foot down it struggled to get above 2k, may have gotten up there eventually but i ran out of street and didn't wanna push my luck on the main road. I can have it idling for 15 mins, turn it off and try start it again straight away and its just as difficult to start again, hot or cold makes no difference.
Ive checked every injector one by one and they are all working fine, I even put new ones in for good measure.
Every cylinder has strong spark, new coils, leads and plugs
All new filters and fresh fuel, also tested the fuel pump, and pressure reg
All new plenum seals, pcv and vacuum hoses
Got a VS ute that runs perfectly so I did a whole bunch of swapnostics on almost all of the sensors, including MAF
Tested and swapped every fuse and relay, including those not connected to the engine
Checked all plugs for good connections and broken wires
Even tried the spray water/carb cleaner trick all around the intake, manifolds, hoses etc to check for leaks
None of these have made any difference at all and to add to my problems to check for fault codes ive tried 2 different scan tools(one cheap, one professional), even purchased the Envyous Customs AED kit for my laptop and none of them can even detect the existence of an ECU, also tried the paperclip trick to check the engine light flashes and it come up with no codes but this may just be because it cant read the ECU. The weird part is the car does run and start so not sure why it cant read an ECU, surely it wouldn't even turn over at all if it couldn't read it?
Thinking the ECU itself could be the obvious issue ive tried 3 ECU's with matching numbers and two BCM's and had the exact same problem with all of them. No communication and still runs and starts like crap. Ive even checked the Diagnostic plug pin by pin to make sure they all have a signal/earth/power.
The only sensors i haven't swapped yet are the Crank Angle, Cam Angle and Oxygen sensors, though ive unplugged the Oxygen sensors while its running and it made no difference where I thought it would. These are next to look at this weekend if i don't find something else to try.
This is my 6th VS V6 and its the first time ive ever encountered a problem I couldn't figure out, really running out of ideas so im looking for any out of the box thoughts that I may not have missed or not thought of.
Really appreciate if anyone can think of anything that can help.