Hello Everyone,

I'm frustrated and desperate for any help I can get!! The track day is within five days and the car is still not drivable.

Here is the background;

The car is a ‘93 R1,
single turbo (HKS kit),
large intercooler,
3" straight through exhaust,
550cc pri/1300cc sec,
upgraded fuel pump,
PMS computer.

The car was running well last year, but was running out of fuel on the top end. Now I installed the 1300cc sec. and cleaned up the rat's nest. Only left on the EGR.

Here is the problem;

Got the car to idle, but any throttle application (in neutral) other than a very gentle one stalls the engine. It also runs shitty above ~3000RPM (while driving).

Here is the query;

Anyone has experience with a similar setup? Are there any fuel map suggestions? Under what conditions does the stock ECU turn on the secondaries?

Please reply or if I don't make it to the race, it's your fault!

But seriously, any help is gratefully appreciated.

Anka

 

its probably a problem related to the removal of the solenoid rack assy. from your description of the things that were different from last year, only the larger injectors and removal of the "rats nest" has changed. changing just the injectors would not affect the behavior of engine in the way you described. try looking over the solenoid assy. and see if you missed something. (something not plugged, or not connected)
hope that helps.

 

if you race that car without having it properly tuned on a dyno or a wideband then you are going to have to tow it home.

get it tuned...get a wideband...test it. 1300s dump a lot more fuel in than the stockers...enough to run rich to the point of bogging it down or blowing it up.

I blew a motor at the track last year...learn from my mistake.

it will be your fault if you do race it and pop the motor.

you are lucky you havent blown your **** up already. trust me on that. you can blow from both rich and lean. you are probably both...an untuned car will run like crap..I know..Ive run bad xs maps before...when you tune it by the seat of your pants you will get it to run..but when you get it on the wideband you will see that you are running all over the place as far as afr's are concerned.

this question is better asked in the single turbo section.

your friggen nuts to be driving it like that...let alone racing it.

j

 

Thanks guys - I will check the solenoids and the remaining vacuum lines.

Artguy - the car has been driven about 500m (meters, that is) so far, I'm not friggen nuts to drive it this way. The problem is, I can can't start the tuning process when the thing won't even idle. I'll re-post in single turbo, thanks for the suggestion.

 

Sounds like your ecu is in protection mode.
I had the same problem when I deleted
some selinoids improperly. You need to clear your trouble codes and delete you selenoids correctly.
Check the mazda manual for how to clear the
codes. It has something to do with disconnecting
the battery and depressing the brake to use up
any residual current.

For what its worth.