Built Evo 8 bad break-up
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Built Evo 8 bad break-up
Hey guys,
Have a 2003 VIII with the following:
26k miles/~5k on build
2.3L stroker
Built heads with +1 valves
AMS 900X turbo fitted to a modified GT30R kit
E85
FIX Bluemax 1650 injectors
Spoolin COP
EBC
Speed density tune
This car is fairly new to me but was driving fine up until a day ago.
Issue: Car now has almost unmanagable breakup at both low RPM and under load (only usable range is above 3k under very light load), and rough idle.
I have:
-replaced spark plugs (.020)
-gapped new plugs smaller than the first set (.018)
-gapped new plugs wider than the first set (.022)
-replaced what appeared to be a bad coil pack
-checked all clamps and elbows
Have not had a boost leak test done yet but am scheduling one with comp/leak down. All clamps appear tight.
So far, no improvement....
Have a 2003 VIII with the following:
26k miles/~5k on build
2.3L stroker
Built heads with +1 valves
AMS 900X turbo fitted to a modified GT30R kit
E85
FIX Bluemax 1650 injectors
Spoolin COP
EBC
Speed density tune
This car is fairly new to me but was driving fine up until a day ago.
Issue: Car now has almost unmanagable breakup at both low RPM and under load (only usable range is above 3k under very light load), and rough idle.
I have:
-replaced spark plugs (.020)
-gapped new plugs smaller than the first set (.018)
-gapped new plugs wider than the first set (.022)
-replaced what appeared to be a bad coil pack
-checked all clamps and elbows
Have not had a boost leak test done yet but am scheduling one with comp/leak down. All clamps appear tight.
So far, no improvement....
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#15
Evolving Member
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Boost leak test: pass (didnt have the stuff to do a smoke test, found leaks before the sensor which i covered but nothing else.) All IC piping is intact and secured with t-bolt clamps.
Compression: test looks good with consistent readings across all cylinders +/- 5 psi
Fuel pressure: 65 at idle, moves up and down with adjusting the FPR, doesnt seem to be an issue
Fuel: added more fuel from another station to help balance out would-be bad fuel
Ignition: have a buddy overnighting me a stock coil pack to check ignition. Fuse looked fine.
Will add the above suggestions to the list!
Thanks guys!
Compression: test looks good with consistent readings across all cylinders +/- 5 psi
Fuel pressure: 65 at idle, moves up and down with adjusting the FPR, doesnt seem to be an issue
Fuel: added more fuel from another station to help balance out would-be bad fuel
Ignition: have a buddy overnighting me a stock coil pack to check ignition. Fuse looked fine.
Will add the above suggestions to the list!
Thanks guys!