So who wants their ECU's "Chromed"?

[Kx1984]

thats great

lol sorry im like a little kid at christmas

im heading to the track tomorrow to mess with my car

[mjannusch]

I am running delphi 1000s and my car starts as good or better than stock. One thing I have noticed is its easy to flood the car out if you stall it or the plugs are fouled. I just unplugged the big injector plug at the injector resistor pack. Start the car and it burns the extra fule out of the engine. Then plug it back in, works everytime. Starts fine again. I am trying to convince GReg to make some kind of choke type fuel cutoff in the ecus codsing. BUt we haven't crossed that bridge yet.

There's already a fuel cutoff in the stock code - hold the throttle to the floor while cranking and it won't inject fuel.

[tfw a-ok]

I'm reporting this because I didn'ty know what to expect. I am getting a P1400 CEL that I cleared prior to the checks. Otherwise, very happy how well this is working out.

Would love to know how different the ECU logic is relative to Manifold Differential Pressure sensor checks for '96 Vs '99.

[Greg E]

Are the part numbers the same for the 96 and 99 MDP sensors?

To trip the CEL the code the sensor output voltage must be 4.5V or more for 4 seconds or is 0.2V or less for 4 seconds. The check only occurs when the coolant temps are > 140degF.

If the sensors are the same, first thing of Check is the adaptor harness. Pin 92 is the MDP input pin. Not sure what pin it is on the 96.

[tfw a-ok]

Thanks Greg, this info is helpful. Since I get the CEL during boost, my guess is that I might have a faulty sensor pushing voltage in excess of 4.5V. As a cheap trick (alternative) I will be installing a zener diode between the output and ground to bleed off voltage over 4.3V to see if this solves the problem. If it works it will be the best dime I ever spent. (ordered 10 at .10c a piece)

[BlackStealth]

I might as well contribute as well. I recently passed emission testing on my 93 with no functioning O2 sensors. On the flash ECU I simply disabled O2 feedback or closed loop control and made sure my tune didn't dip below 14.7 AFR. The only tuning I did was adjust the global injector scaling and injector lag times. I'm still shocked at how well open loop is working out for me, it's been over a year and no problems between season changes.

[Greg E]

Thanks Greg, this info is helpful. Since I get the CEL during boost, my guess is that I might have a faulty sensor pushing voltage in excess of 4.5V. As a cheap trick (alternative) I will be installing a zener diode between the output and ground to bleed off voltage over 4.3V to see if this solves the problem. If it works it will be the best dime I ever spent. (ordered 10 at .10c a piece)

Why not just disable the CEL in periphery 2?

[Greg E]

I might as well contribute as well. I recently passed emission testing on my 93 with no functioning O2 sensors. On the flash ECU I simply disabled O2 feedback or closed loop control and made sure my tune didn't dip below 14.7 AFR. The only tuning I did was adjust the global injector scaling and injector lag times. I'm still shocked at how well open loop is working out for me, it's been over a year and no problems between season changes.

Win!!

[Kx1984]

having problems lowering my idle

its at a constant 1500 rpms
idle value set at 1000 rpms

i have a q45 throttle body
and a remote iac block

any ideas?

[evo_is_fast]

anyone notice that the AEM wideband its self would show 10.5 but on the evoscan loggs showed 11.0 seems like its something in evoscan 2.6? i tried looking it up on google and for others that had the same problem on other cars said to switch to 2.7 or 2.5.