ECMlink No Idle after switching to SD

[xn35]

ISC - GOOD
BISS - set
TPS- set correct
Timing - set correctly
ECMLINK Plug n play harness for omni 4 bar and AIT

The car won't run after switching to SD. Once in a while, it will start and run at high idle for a few seconds, then die. I recently had it running on GM MAFT.

I've tried different Inj dead times. Ive done lots of reading and I am still stumped. What am I missing?

Please help.

 

[steve]

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Not sure your MAP sensor got configured correctly and that causes weird airflow values with the corresponding injector pulse values that would be pretty large with 1200cc injectors. (0.72gm/rev at 334 rpm doesn't seem reasonable to me) Also try adding BARO to your logged parameters. Normally with SD it would be locked even if you don't check the box on the ECU Inputs tab.

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You might want to clean or replace the plugs if they have gotten fuel fouled.

 

[nice97civic]

Also is there a wideband hooked up? AFRatioEst is remarkably rich. Perhaps this is due to the MAP sensor mentioned by Steve.

 

[steve]

Also is there a wideband hooked up? AFRatioEst is remarkably rich. Perhaps this is due to the MAP sensor mentioned by Steve.

Configured on EGRTemp but perhaps not connected or mis-scaled.

 

[xn35]

I am about try another log with Baro. Plugs were wet. Wideband being off would make sense as well. I was using numbers online and all I really had to go off was knowing it is LSU4.2 and an old AEMwideband gauge. I did try it as well with the wideband being unpinned, and it didnt make a difference

 

[xn35]

No change in Baro. What should I do? This log has the Wideband unpinned

 

[nice97civic]

Can you list your mods please? Also since it wont start, can you un-check hot-start enrichment? Not sure this matters since the motor won't be warm if it won't idle but something is giving you super rich afr's on crank.

 

[xn35]

I had it working fine on MAFT. The only thing that changed was plugging in IAT and MAP and removing MAFT.
Kelford 272
Hardwire 255
Deatschwerks AFPR 43.5
Wiseco/Eagle
FIC 1200
I/R EBC

 

[xn35]

Enrich disabled

 

[nice97civic]

do you happen to have a startup log when it was on MAFT?

 

[xn35]

This should be it

 

[xn35]

Here is one at regular idle

 

[nice97civic]

Couple things: In your SD log, your TPS Volts stays locked at 0.65v. On your MAFT startup log, the TPS Volts starts at 0.65v and fluctuates as the car tries to start but then in the idle log, TPS Volts are 0.65v with key on and then 0.67v during idle.

Your AFRatioEST during idle is showing extremely lean 30:1+

Was this car driving or just idling when on MAFT?

 

[xn35]

TPS goes to 1% at .67 usually sits at .63/.65. I think it's just the vacuum on the TB plate at idle, not really a concern at the time. It was running and driving on MAFT that's when I purchased the car last year and I've been trying to fix a lot of the issues. I don't have any driving logs and zeroed everything out.

 

[Stapl3]

Your AFRatioEST during idle is showing extremely lean 30:1+

I suspect this is because the maft was adding a ton of fuel unknown to the ECU. The ECU estimated it was lean as hell, but the blind offset made things work out.

OP you need to log more values. Especially on the ECU Inputs tab. No wideband sensor logged? Come onnn...

 

[xn35]

I suspect this is because the maft was adding a ton of fuel unknown to the ECU. The ECU estimated it was lean as hell, but the blind offset made things work out.

OP you need to log more values. Especially on the ECU Inputs tab. No wideband sensor logged? Come onnn...

Did you look at the first log?

 

[Imback]

You need to log the map sensor so you can see if your issue is there since that is the only variable

 

[xn35]

Thanks for having a look? is that the SD ratio?

 

[xn35]

This one has it listed under omni4bar

 

[Stapl3]

Are you absolutely positive the physical ignition timing is correct?

I suspect you're lean but there's not much information.

Before you do another log, hit f10 and capture everything.

 

[xn35]

I capture as much as it would let me. let me know if there is anything I should trade out
A pillar WB/AFR is in the 14-15s,
I set ignition timing when it was still on MAFT. The car has not moved since.

 

[xn35]

Spark Plugs are also filthy again

 

[Imback]

Your reading negative with the car off so either you have the wrong map sensor or it's faulty. I would also open up your biss. I set that after the car is idling.

 

[xn35]

So I pinched off the line for the map sensor and now it will idle without dying. Still insanely rich. Getting 11:1 on the wideband gauge. I'm going to try and get another sensor but it is brand new. Anyone else have thought

 

[xn35]

I also adjusted elevation to zero out the map sensor. I pulled vacuum and it matched what my gauge said so it must still be accurate.