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Tuning Out Of Wack

LTHLRB

By LTHLRB,
in Engines & Forced Induction

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LTHLRB Grand Master

LTHLRB

Posted
Posted (edited)

A few months ago i got my car tuned to 11 psi and got 205rwkw with an af/r of ~11. Now on a little more boost the car doesnt go at all like it has fuel cut out and the engine just jerks when it cuts out. I had my timing advanced and i have been told the standard ecu resets itsself when it exceeds 205rwkw. I am assuming my timing has gone back to zero. Under load on high boost it misses alot. Hits full boost approx 13 - 14psi at 3 - 4,000 rpm and after that it feels like nothing. just slow revving to 7,000 rpm.

If anyone can shed some light on this, it will be greatly appreciated.

Thanks, Phill [LTHLRB]

Edited by LTHLRB
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paulr33 Grand Master

paulr33

Posted
Posted

do you have a remap?

if YES

the ecu could be picking up excessive detonation and dropping to the low octane map

was the rich and retard protection removed/disabled/edit'ed to go away?

if NO

rich and retard is being activated due to the ecu seeing excessive airflow, ie: more than it is happy with dealing with, so it panics and protects itself, dumps the timing and richens itself up. a search will give you the answers you are looking for

LTHLRB Grand Master

LTHLRB

Posted
  • Author
Posted

it wasnt remapped. It was going fine for a while and i ran a 13.1 second pass at calder in full street trim. But after that it just died out. I think its retarding and getting very rich. Fuel economy is out the window. Engine isnt pinging or knocking though. Fuel delivery is fine. 500hp tomei pump is doing well. The car is going in tomorow to get tuned. Is there any way to remap the standard ecu's ?

LTHLRB Grand Master

LTHLRB

Posted
  • Author
Posted

well the dyno tuner is going to run through the afr's. Also re gap the plugs. Also get the right boost and check for pinging/knocking. Also advance timing to a safe but good level. Not much really you can do to a standard ecu. I just want it to last till nov/dec when i get my power fc :O

  • 4 weeks later...
LTHLRB Grand Master

LTHLRB

Posted
  • Author
Posted

like paulr33 said, too much boost made it dump the timing and richen itself up. The plugs were re gapped and pinging and knocking was checked. Ignition timing was advanced to a safe level. Made more power than last time on 11psi. Cant go much more than that or it will do the same thing over again.

l0WRB Mentor

l0WRB

Posted
Posted
like paulr33 said, too much boost made it dump the timing and richen itself up. The plugs were re gapped and pinging and knocking was checked. Ignition timing was advanced to a safe level. Made more power than last time on 11psi. Cant go much more than that or it will do the same thing over again.

out of interest how far did they advance the timing? i know stock is 15degrees advanced at 650rpm? is 20degrees advanced at 650rpm doable?

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