Dyno today-Misfire,injectors maxing out,couldn't run full boost !
08 December 2007, 03:44 PM
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Dyno today-Misfire,injectors maxing out,couldn't run full boost !
Finally got my car on the dyno at Powerstation today after being mapped by Jolly Green Monster and i'm disappointed to say the least.
Had a bad misfire trying to run 1.55 bar,injectors were maxing out very early,fuelling was all over the place.
Managed a run at 1.3 bar,still a misfire and injectors running at 93% duty producing 335bhp and 280lb/ft
On the road,it doesn't misfire running 1.5 bar but around 5000rpm the check engine light starts flashing.
Full spec is in my profile.
I'll post the dyno graph up shortly.
Any ideas what could be causing this as I want to get it sorted asap ?
Had a bad misfire trying to run 1.55 bar,injectors were maxing out very early,fuelling was all over the place.
Managed a run at 1.3 bar,still a misfire and injectors running at 93% duty producing 335bhp and 280lb/ft
On the road,it doesn't misfire running 1.5 bar but around 5000rpm the check engine light starts flashing.
Full spec is in my profile.
I'll post the dyno graph up shortly.
Any ideas what could be causing this as I want to get it sorted asap ?
08 December 2007, 03:56 PM
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Finally got my car on the dyno at Powerstation today after being mapped by Jolly Green Monster and i'm disappointed to say the least.
Had a bad misfire trying to run 1.55 bar,injectors were maxing out very early,fuelling was all over the place.
Managed a run at 1.3 bar,still a misfire and injectors running at 93% duty producing 335bhp and 280lb/ft
On the road,it doesn't misfire running 1.5 bar but around 5000rpm the check engine light starts flashing.
Full spec is in my profile.
I'll post the dyno graph up shortly.
Any ideas what could be causing this as I want to get it sorted asap ?
Had a bad misfire trying to run 1.55 bar,injectors were maxing out very early,fuelling was all over the place.
Managed a run at 1.3 bar,still a misfire and injectors running at 93% duty producing 335bhp and 280lb/ft
On the road,it doesn't misfire running 1.5 bar but around 5000rpm the check engine light starts flashing.
Full spec is in my profile.
I'll post the dyno graph up shortly.
Any ideas what could be causing this as I want to get it sorted asap ?
08 December 2007, 03:57 PM
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Simon's been upto me twice now in the last couple of weeks !
It's strange that he checked the car over on Wednesday evening and everything was good and now it isn't !
08 December 2007, 03:59 PM
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It's very strange that the injectors were hitting 100%+ duty cycle as such a low rpm.
The missing on low boost was prob because the rollers were causing more load on the car than you would get on the road.
But if you went to boot it up cleeve hill or leckhampton hill or something, then i'd think it will miss then.
Try it, and if it's missing, regap the plugs.
The same thing is prob true with the injectors, if it was mapped down the valley, which is pretty much flat, then it will be fine, but try it on high boost up the hill and watch the duty cycle.
Sure he said the fueling was prob only fluctuating as it was missing.
The missing on low boost was prob because the rollers were causing more load on the car than you would get on the road.
But if you went to boot it up cleeve hill or leckhampton hill or something, then i'd think it will miss then.
Try it, and if it's missing, regap the plugs.
The same thing is prob true with the injectors, if it was mapped down the valley, which is pretty much flat, then it will be fine, but try it on high boost up the hill and watch the duty cycle.
Sure he said the fueling was prob only fluctuating as it was missing.
08 December 2007, 04:05 PM
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It's very strange that the injectors were hitting 100%+ duty cycle as such a low rpm.
The missing on low boost was prob because the rollers were causing more load on the car than you would get on the road.
But if you went to boot it up cleeve hill or leckhampton hill or something, then i'd think it will miss then.
Try it, and if it's missing, regap the plugs.
The same thing is prob true with the injectors, if it was mapped down the valley, which is pretty much flat, then it will be fine, but try it on high boost up the hill and watch the duty cycle.
Sure he said the fueling was prob only fluctuating as it was missing.
The missing on low boost was prob because the rollers were causing more load on the car than you would get on the road.
But if you went to boot it up cleeve hill or leckhampton hill or something, then i'd think it will miss then.
Try it, and if it's missing, regap the plugs.
The same thing is prob true with the injectors, if it was mapped down the valley, which is pretty much flat, then it will be fine, but try it on high boost up the hill and watch the duty cycle.
Sure he said the fueling was prob only fluctuating as it was missing.
Tried it uphill as Andy@Powerstation suggested and there was no misfire at all
Just the cel flashing when it gets to around 5000rpm !
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08 December 2007, 04:11 PM
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It's definately not knock as it's only showing readings in the 30's and the warning is set at 60.
Andy said there was no knock when it was on the dyno.
08 December 2007, 04:22 PM
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08 December 2007, 04:33 PM
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I don't know if one of the coil packs could be breaking down or the plugs aren't gapped correctly.
Anyone know what PFR7B's should be gapped to running the kind of boost that I am ?
08 December 2007, 04:34 PM
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