GTR R32 issues

[Cobain]

I’m having backfire issues on closed throttle, more severe under 2500 rpm   

just had a Haltech ecu upgrade including wide band, with new high flow cat and exhaust system from straight pipe. 

Was also Dyno tuned at what I thought was a reputable tuner in NSW. 

Seems they were happy to take large amounts of money but are saying there’s nothing they can do now. 

Never backfired before taking it to tuner. 

Where is a decent mechanic for the GTR in Sydney?

[mr_rbman]

You sure the hi-flo cat isn't just a straight thru?!?!

That would certainly cause back firing (flameage...)

 

[Ben C34]

25 minutes ago, mr_rbman said:

You sure the hi-flo cat isn't just a straight thru?!?!

That would certainly cause back firing (flameage...)

 

You can definitely have no cat and not have back fires.

it's a tune issue, the fact they aren't interested in addressing it is pretty poor. It's really not that hard if you know what you are doing. Which they should.

[OllieR]

Agree, it’s a fuelling issue, unburnt fuel + hot exhaust = backfire

remap required