XJ6 Now Running but fuel trims weird
#1
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Hi,
Finally got my XJ6 3.0L running after putting on 2 used heads. and tracing an ECU earth issue. But:
I get misfires on Bank 1 P3000 P0301,0303,0305 and P0442.
I have checked LT Fuel trims while driving using Torque Pro
Restricted performance comes on at light load and decel.
At Idle Bank 1= 6.2 Bank 2 =1.2
At 1500 Bank 1=-8 Bank 2=10
At 2000 Bank 1=-10 Bank 2=19
Fuel pressure is 55-58 psi
Replaced all upper/lower manifold gaskets.
Any ideas where to start it? has also had new NGK plugs
or what else should I monitor with Torque?
Finally got my XJ6 3.0L running after putting on 2 used heads. and tracing an ECU earth issue. But:
I get misfires on Bank 1 P3000 P0301,0303,0305 and P0442.
I have checked LT Fuel trims while driving using Torque Pro
Restricted performance comes on at light load and decel.
At Idle Bank 1= 6.2 Bank 2 =1.2
At 1500 Bank 1=-8 Bank 2=10
At 2000 Bank 1=-10 Bank 2=19
Fuel pressure is 55-58 psi
Replaced all upper/lower manifold gaskets.
Any ideas where to start it? has also had new NGK plugs
or what else should I monitor with Torque?
#3
#4
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joesoap (11-28-2015)
#5
#6
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Start with all the items you removed/replaced
It's unlikely that a fault developed in a new area (one that you did not touch) while your repair was going on.
To track down the leak the most effective ways are a vac pump or a smoke machine.
I posted details on how to make one for under 10 bucks.
see here https://www.jaguarforums.com/forum/x...-leaks-117917/
You also need to take care of the misfires, try swapping plugs and coils to identify the faulty parts.
Cheers
34by151
It's unlikely that a fault developed in a new area (one that you did not touch) while your repair was going on.
To track down the leak the most effective ways are a vac pump or a smoke machine.
I posted details on how to make one for under 10 bucks.
see here https://www.jaguarforums.com/forum/x...-leaks-117917/
You also need to take care of the misfires, try swapping plugs and coils to identify the faulty parts.
Cheers
34by151
The following users liked this post:
joesoap (11-29-2015)
#7
The following users liked this post:
joesoap (11-29-2015)
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#8
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#12
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Yes, propane is OK (don't light it) but just tiny amounts - you're not trying to set fire to the car!
For a feel of what the STFTs do, spray a bit of propane into the air intake - that's a sort of big air leak![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
(That's not a good test, but hey. You could always remove a vacuum hose slightly and spray there.)
For a feel of what the STFTs do, spray a bit of propane into the air intake - that's a sort of big air leak
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
(That's not a good test, but hey. You could always remove a vacuum hose slightly and spray there.)
Last edited by JagV8; 12-01-2015 at 03:52 AM.