Emissions fail
#1
Emissions fail
I had my miata tested this morning (national car test), everything good apart from emissions.
My CO% was 8.39% way above the 3.5% limit and HC was 572ppm which came in under the 750 limit.
I recently fitted a walbro 190hp and now i'm running very rich at idle
My guess is the walbro is over powering the stock reg but I thought this was only a problem with the 255 pump. Can the stock regulator get weak?
I could always change back to the standard pump for the test but would rather sort it out.
Any Ideas?
Set up is 1990 1.6, greddy turbo @8psi, 2.5 inch exhaust, decat, FMIC, Vortec FMU (8:1 disc), BIPES, O2 clamp, walbro 190hp, 265cc injectors & forge valve.
My CO% was 8.39% way above the 3.5% limit and HC was 572ppm which came in under the 750 limit.
I recently fitted a walbro 190hp and now i'm running very rich at idle
My guess is the walbro is over powering the stock reg but I thought this was only a problem with the 255 pump. Can the stock regulator get weak?
I could always change back to the standard pump for the test but would rather sort it out.
Any Ideas?
Set up is 1990 1.6, greddy turbo @8psi, 2.5 inch exhaust, decat, FMIC, Vortec FMU (8:1 disc), BIPES, O2 clamp, walbro 190hp, 265cc injectors & forge valve.
#7
I had my miata tested this morning (national car test), everything good apart from emissions.
My CO% was 8.39% way above the 3.5% limit and HC was 572ppm which came in under the 750 limit.
I recently fitted a walbro 190hp and now i'm running very rich at idle
My guess is the walbro is over powering the stock reg but I thought this was only a problem with the 255 pump. Can the stock regulator get weak?
I could always change back to the standard pump for the test but would rather sort it out.
Any Ideas?
Set up is 1990 1.6, greddy turbo @8psi, 2.5 inch exhaust, decat, FMIC, Vortec FMU (8:1 disc), BIPES, O2 clamp, walbro 190hp, 265cc injectors & forge valve.
My CO% was 8.39% way above the 3.5% limit and HC was 572ppm which came in under the 750 limit.
I recently fitted a walbro 190hp and now i'm running very rich at idle
My guess is the walbro is over powering the stock reg but I thought this was only a problem with the 255 pump. Can the stock regulator get weak?
I could always change back to the standard pump for the test but would rather sort it out.
Any Ideas?
Set up is 1990 1.6, greddy turbo @8psi, 2.5 inch exhaust, decat, FMIC, Vortec FMU (8:1 disc), BIPES, O2 clamp, walbro 190hp, 265cc injectors & forge valve.
I can sell you a BEGI rising rate cheap cheap which is an upgrade from the Vortech in terms of 'tune-ability'. It is, however, still dated technology. Which is while I'm willing to sell it cheap.
-Zach
#8
I would still like to find the issue. Can anyone speak from experience.
#9
If you're unwilling to go 'squirt, and you want to pass emissions, your best bet would be to pair a BEGI adjustable rising rate with an adjustable FPR. It's well documented that the OEM FPR will not tolerate a 255 pump.
I can sell you a BEGI rising rate cheap cheap which is an upgrade from the Vortech in terms of 'tune-ability'. It is, however, still dated technology. Which is while I'm willing to sell it cheap.
-Zach
I can sell you a BEGI rising rate cheap cheap which is an upgrade from the Vortech in terms of 'tune-ability'. It is, however, still dated technology. Which is while I'm willing to sell it cheap.
-Zach
Thanks for the offer of the begi, I'm in ireland so not sure how the postage would work out, i'' look into it.
#10
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While i do believe that people should just not respond to threads like these, then they would slip away with 0 replies and be forgotten. I also think that maybe OP should figure out why it's rich, and what he has done to make it do this.
Stock FPR has been known to fail on the 190hp pump (from what i remember seeing on this forum(for some reason the 1.6 ones seemed to be better though)). Do you have a fuel pressure gauge?
I must admit, running all these bandaids isn't helping, along with not using a cat.
Stock FPR has been known to fail on the 190hp pump (from what i remember seeing on this forum(for some reason the 1.6 ones seemed to be better though)). Do you have a fuel pressure gauge?
I must admit, running all these bandaids isn't helping, along with not using a cat.
#13
While i do believe that people should just not respond to threads like these, then they would slip away with 0 replies and be forgotten. I also think that maybe OP should figure out why it's rich, and what he has done to make it do this.
Stock FPR has been known to fail on the 190hp pump (from what i remember seeing on this forum(for some reason the 1.6 ones seemed to be better though)). Do you have a fuel pressure gauge?
I must admit, running all these bandaids isn't helping, along with not using a cat.
Stock FPR has been known to fail on the 190hp pump (from what i remember seeing on this forum(for some reason the 1.6 ones seemed to be better though)). Do you have a fuel pressure gauge?
I must admit, running all these bandaids isn't helping, along with not using a cat.
If not is there a good replacement for the stock fpr?
Why is the de cat a problem?
Just looking for some simple advice on how to keep pressure in Hg with my current set-up. thats all.
#15
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Should a good stock FPR keep pressure with a 190hp? Maybe, sometimes.
If not is there a good replacement for the stock fpr? Megasquirt, stock fuel pump and stock FPR.
Why is the de cat a problem?
If not is there a good replacement for the stock fpr? Megasquirt, stock fuel pump and stock FPR.
Why is the de cat a problem?