idel is ruogh, plugs are black
01-10-2008, 12:12 AM
#27
If you're loved, you can get a friend to turn the key for you.
If you're not, pull the starter wire out of the harness in the key, and run it to +12V and touch it. That should get the starter turning.
Questions:
1)In MegaTune, when you're cranking, do you see a little green "Synced" in the bottom right? If not, the MS doens't know your engine is running.
2) Are you sure you have coil A where A goes and B where B goes?
3) Do you get ANY spark at all? Try pulling the plugs out of the motor, laying them on the valve cover. Clip them to the valve cover bolts as a good ground and plug them into the cables. Do you see a spark? You can use "output test mode" to check this.
If you're not sure you're firing, you're going to have issues. If you're not firing at the right time, you're also going to have issues.
Check the basics or you'll waste a lot of time running around checking weird theories - you shouldn't have to drain your oil to get a computer running. :-)
Anyway, my car sparks when cranking, though I have to go a revolution or two to get sync, I DO get spark and can set timing if I run the starter for 2-5 seconds, longer to get a good reading.
If you're not, pull the starter wire out of the harness in the key, and run it to +12V and touch it. That should get the starter turning.
Questions:
1)In MegaTune, when you're cranking, do you see a little green "Synced" in the bottom right? If not, the MS doens't know your engine is running.
2) Are you sure you have coil A where A goes and B where B goes?
3) Do you get ANY spark at all? Try pulling the plugs out of the motor, laying them on the valve cover. Clip them to the valve cover bolts as a good ground and plug them into the cables. Do you see a spark? You can use "output test mode" to check this.
If you're not sure you're firing, you're going to have issues. If you're not firing at the right time, you're also going to have issues.
Check the basics or you'll waste a lot of time running around checking weird theories - you shouldn't have to drain your oil to get a computer running. :-)
Anyway, my car sparks when cranking, though I have to go a revolution or two to get sync, I DO get spark and can set timing if I run the starter for 2-5 seconds, longer to get a good reading.
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01-10-2008, 04:22 PM
#28
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Thanks abe but heres an update
BRAIN - I put the 460ccs in and ran your maps. Did the SAME THING! I know its getting spark, because it runs, but it barley idels and runs very rugh (chug chug chug chug). I know it is running SUPER rich, I can even smell the gas.
I lowered the points on the VE table by 18, dident change (yes I burned it). I re did the rq fuel, changing the A/F up and down... no change. I lowered the warmup enrich.. no change.
The wireing harness looks good. I cut the wires you are supposed to cut going to the ECU, and everything is wired right
I have come to the conclution that I must have messed up something inside the MS. My only question is what could it be?
And yes, the car runs fine with the stock ECU (it is not an engine problem)
BRAIN - I put the 460ccs in and ran your maps. Did the SAME THING! I know its getting spark, because it runs, but it barley idels and runs very rugh (chug chug chug chug). I know it is running SUPER rich, I can even smell the gas.
I lowered the points on the VE table by 18, dident change (yes I burned it). I re did the rq fuel, changing the A/F up and down... no change. I lowered the warmup enrich.. no change.
The wireing harness looks good. I cut the wires you are supposed to cut going to the ECU, and everything is wired right
I have come to the conclution that I must have messed up something inside the MS. My only question is what could it be?
And yes, the car runs fine with the stock ECU (it is not an engine problem)
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01-10-2008, 04:30 PM
#29
Boost Czar
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using the same AIT corrections and warmup settings as my map, same req fuel? changed dwell back up?
acutally sounds like you're not controlling the fuel. you cut the wires for triggers and injectors to the ecu right?
acutally sounds like you're not controlling the fuel. you cut the wires for triggers and injectors to the ecu right?
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01-10-2008, 05:08 PM
#30
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Brain, yes. At first I forgot the dwell, then when I changed it it seemed to idle slightly better.. but everything you listed is done. Its almost like when I change the VE table it doesent even make much of a difference. Altho it will sorta idle now... kinda
question, what is the AE drivin fuel precentage? it seems to idle somewhat at first, then that meter swings to the left and the idle gets worse.
Also, my wideband says around 13 to 15 to one at idle, yet I can acually smell fuel from the exhaust (really rich). I do have a little leak before the sensor, can that change the readings?
question, what is the AE drivin fuel precentage? it seems to idle somewhat at first, then that meter swings to the left and the idle gets worse.
Also, my wideband says around 13 to 15 to one at idle, yet I can acually smell fuel from the exhaust (really rich). I do have a little leak before the sensor, can that change the readings?
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01-12-2008, 01:59 AM
#36
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I've had 2 occasions where all the settings in the msq looked right, but it tried to idle at 200rpm. I can only assume a corrupted or truncated .msq save. Load up the diy base msq with the adjusted required fuel (if not running stock injectors) and see what happens.
I've had a few problems with megatune. My idle VE values are 28-31 (can't remember where I put them last week, but they're perfect). If you're rich, lean the ************ out.
I've had a few problems with megatune. My idle VE values are 28-31 (can't remember where I put them last week, but they're perfect). If you're rich, lean the ************ out.
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01-13-2008, 01:36 AM
#38
If it's running for a bit, and then stopping, I would highly suspect it's After Start Enrichment, and/or PWM Idle, both of those do something for a very short time after starting, then shut off, which can cause an instant change.
Also, another really basic thing: Have you checked that all four plugs are firing? This is easy to test, pull the plugs, lay them on the valve cover, plug them in and turn the motor over till it syncs. Or, just do an "output test" - though when I was having syncing issues this lead me to believe things were working when they weren't.
If you believe in "be kind to your coils week", then clip, attach, or otherwise ensure a good ground for your plugs.
But this is a good place to start, you might only be firing on one coil. Crappy, chuggy idle and rich smell is entirely consistant with a coil not working, be it hooked up wrong or just burnt out.
(I'm suggesting the oddball stuff since these other fine folks are on top of the most likely ones)
<Edit>
1) Did you check your timing?
2) Did you check for consistant sync/spark.
When mine was getting bad sync, that's exactly what it did. Fire once in a while, but not really run.
Also, another really basic thing: Have you checked that all four plugs are firing? This is easy to test, pull the plugs, lay them on the valve cover, plug them in and turn the motor over till it syncs. Or, just do an "output test" - though when I was having syncing issues this lead me to believe things were working when they weren't.
If you believe in "be kind to your coils week", then clip, attach, or otherwise ensure a good ground for your plugs.
But this is a good place to start, you might only be firing on one coil. Crappy, chuggy idle and rich smell is entirely consistant with a coil not working, be it hooked up wrong or just burnt out.
(I'm suggesting the oddball stuff since these other fine folks are on top of the most likely ones)
<Edit>
1) Did you check your timing?
2) Did you check for consistant sync/spark.
When mine was getting bad sync, that's exactly what it did. Fire once in a while, but not really run.
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01-13-2008, 01:53 AM
#39
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Man, I had the after start enrich set to 0, and warmup at 100% across the board, and thats the only way I could get it to sorta idle.
At those settings my wideband says 19 to 1 (!) but when I make it richer, the idle gets worse and worse. Plus even tho it says 19 to 1, it was still running pig freakin rich (plugs indicated it)
I really cant check timeing, I cant get it to idle good enough. I used brains setting, and I moved the trigger angle up and down... no change.
It is synced. when I go to tuneing - VE, it is getting a constant feed.
I just dont get it... its like the MS has the injectors flowing MAX all the time.
When I pulled all 4 plugs, all 4 were covered with carbon. If 2 plugs were fireing, those 2 would look ok. Thus I know all 4 plugs are fireing.
At those settings my wideband says 19 to 1 (!) but when I make it richer, the idle gets worse and worse. Plus even tho it says 19 to 1, it was still running pig freakin rich (plugs indicated it)
I really cant check timeing, I cant get it to idle good enough. I used brains setting, and I moved the trigger angle up and down... no change.
It is synced. when I go to tuneing - VE, it is getting a constant feed.
I just dont get it... its like the MS has the injectors flowing MAX all the time.
When I pulled all 4 plugs, all 4 were covered with carbon. If 2 plugs were fireing, those 2 would look ok. Thus I know all 4 plugs are fireing.
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01-13-2008, 04:20 AM
#40
It would not hurt to pull the plugs and see if they are actually firing, every time. It's easy to do.
The timing should not be hard to check. It's really worth doing.
After that, I would think a stuck open injector, but I guess it doesn't fit the symptoms. Out of curiosity, what's your req fuel setting?
Maybe you have somethign weird like your opening time set to 15 ms.
The timing should not be hard to check. It's really worth doing.
After that, I would think a stuck open injector, but I guess it doesn't fit the symptoms. Out of curiosity, what's your req fuel setting?
Maybe you have somethign weird like your opening time set to 15 ms.
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