Warm start Idle issue...?
Oct 15, 2009, 05:51 PM
#1
Warm start Idle issue...?
Ok, so thought I had it fixed, but I am still flooding out every now and again, only it is on warm start. Car acts likes it flooded, holds RPM at about 500, or sometimes it won't even start. I have to hold the gas pedal a little to get it to start, or to catch it's idle. Any Idea's? 
Oct 16, 2009, 10:59 AM
#6
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Yeah....sounds like time for a vacuum check....Boost leak check might be good too.
Zip tie every vacuum line and tighten every intake clamp. I re-check my intake clamps about every other month or so.
I would pull the ISCV and clean it really good. They can get gunked up and cause some problems.
Lastly, you changed a bunch of stuff to combat cold start issues. Might you have done too much and caused the warm issue????
Zip tie every vacuum line and tighten every intake clamp. I re-check my intake clamps about every other month or so.
I would pull the ISCV and clean it really good. They can get gunked up and cause some problems.
Lastly, you changed a bunch of stuff to combat cold start issues. Might you have done too much and caused the warm issue????
Oct 16, 2009, 08:16 PM
#7
Yeah....sounds like time for a vacuum check....Boost leak check might be good too.
Zip tie every vacuum line and tighten every intake clamp. I re-check my intake clamps about every other month or so.
I would pull the ISCV and clean it really good. They can get gunked up and cause some problems.
Lastly, you changed a bunch of stuff to combat cold start issues. Might you have done too much and caused the warm issue????
Zip tie every vacuum line and tighten every intake clamp. I re-check my intake clamps about every other month or so.
I would pull the ISCV and clean it really good. They can get gunked up and cause some problems.
Lastly, you changed a bunch of stuff to combat cold start issues. Might you have done too much and caused the warm issue????
Also got an interesting situation with car going into low octane and low boost maps now. Only thing that I did was drive to the top of one of the canyons here in SLC, and since coming back down, I have only been in low boost... Elevation change of about 3K feet.... Back to the drawing board...lol.
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Oct 17, 2009, 06:28 PM
#8
When running PSI based/ECU Based Boost controll, do i need to remove the tables that were stock like the BDEL tables? Because I have both MFREDS tables(baseline boost) and the stock BDEL, could this be giving me an error? Pro's...Guru's...Weakend warriors?
Oct 17, 2009, 09:09 PM
#9
For your flooding problem what size injectors?
I found with larger injectors and pump gas i had to decrease the primer cranking pulse to get the car to fire reliably. I can help you grab the right table if i know what rom you're using.
Oct 17, 2009, 10:56 PM
#10
I found with larger injectors and pump gas i had to decrease the primer cranking pulse to get the car to fire reliably. I can help you grab the right table if i know what rom you're using.
I am interested in understanding the injector pulse you speak of. I am on the 94170015 rom, running ecu/psi based boost controll.
Thanks in advance.
Oct 17, 2009, 11:42 PM
#11
The primer is just the inital squirt of fuel into the camber for ignition. The decay is a cold start enrichment helper keeping the idle up while the chamber comes to temp.
PHP Code:
<table name="Post Primer Enrich Decay #1" category="Fuel" address="3712" type="2D" level="2" scaling="EnrichmentAdj">
<table name="Engine Temp" address="67bc" type="X Axis" elements="9" scaling="Temp"/>
</table>
<table name="Post Primer Enrich Decay #2" category="Fuel" address="3722" type="2D" level="2" scaling="EnrichmentAdj">
<table name="Engine Temp" address="67bc" type="X Axis" elements="9" scaling="Temp"/>
</table>
<table name="Post Primer Enrich #1" category="Fuel" address="3732" type="2D" level="2" scaling="uint8">
<table name="Engine Temp" address="67bc" type="X Axis" elements="9" scaling="Temp"/>
</table>
<table name="Post Primer Enrich #2" category="Fuel" address="3742" type="2D" level="2" scaling="uint8">
<table name="Engine Temp" address="67bc" type="X Axis" elements="9" scaling="Temp"/>
</table>
<table name="Primer Cranking Enrich - First Pulse" category="Fuel" address="3810" type="2D" level="2" scaling="uint8">
<table name="Engine Temp" address="67d8" type="Y Axis" elements="11" scaling="Temp"/>
</table>
Oct 18, 2009, 12:11 AM
#12
Well with stock injectors you really shouldn't have a problem I'll post the tables anyways though so you can see.
The primer is just the inital squirt of fuel into the camber for ignition. The decay is a cold start enrichment helper keeping the idle up while the chamber comes to temp.
The primer is just the inital squirt of fuel into the camber for ignition. The decay is a cold start enrichment helper keeping the idle up while the chamber comes to temp.
Can you also give me a heads up of possible settings in those primer tables?
Thanks again
Oct 18, 2009, 12:17 AM
#14
I agree on "shouldn't have an issue", but for some reason, it doesn't want to fire sometime, and just hangs out in the low area. I even have to hold the accelerator sometimes to get it fire. Not sure why.
Can you also give me a heads up of possible settings in those primer tables?
Thanks again
Can you also give me a heads up of possible settings in those primer tables?
Thanks again
Oct 18, 2009, 05:19 AM
#15
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Unfortunatley I think this is *one of those things* that a lot of people are having problems with especially if the car ages. We are systematically swapping parts out on my friends car. I think we completed the whole fuel system. He just tried my ecu yesterday. Now he is on to intake parts. This is something that affected stock DSM's as well as the cars aged and now it looks like something is happening to evo's. After market injectors seem to make this problem worse or in some cases disappear.