650rwhp help on ignition...
04-06-2007, 06:03 PM
#1
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650rwhp help on ignition... Oh boy...
Everything was going well... The car's all built and ready for the tune... She was pullin hard at 5800rpms easily making over 600rwhp... Then the ignition started "stuttering" or "poping" after 6000 on the 3rd pull (almost sounding like it was hitting the rev limiter, but wasnt)... WTF? After the stuttering, the engine would not fire (would crank but not fire)...
Pulled the plugs, their fine... All plug wires are on... The spark is not reaching the plugs, anyone have this problem? So we pulled the plug from the head and still had it in the wire and cranked the engine over... No spark from that plug? Fuses are all good and we checked the coil packs... Does anyone have some places to start or what could be happening besides the obvious?
I would estimate the car should easily make 900crank HP... can the factory ignition handle this amount of HP?
We did install the synergy 2-step but it was turned off for pulls... Dont know if that could cause something like this? Im still utilizing the factory pcm...
Im lost...
Everything was going well... The car's all built and ready for the tune... She was pullin hard at 5800rpms easily making over 600rwhp... Then the ignition started "stuttering" or "poping" after 6000 on the 3rd pull (almost sounding like it was hitting the rev limiter, but wasnt)... WTF? After the stuttering, the engine would not fire (would crank but not fire)...
Pulled the plugs, their fine... All plug wires are on... The spark is not reaching the plugs, anyone have this problem? So we pulled the plug from the head and still had it in the wire and cranked the engine over... No spark from that plug? Fuses are all good and we checked the coil packs... Does anyone have some places to start or what could be happening besides the obvious?
I would estimate the car should easily make 900crank HP... can the factory ignition handle this amount of HP?
We did install the synergy 2-step but it was turned off for pulls... Dont know if that could cause something like this? Im still utilizing the factory pcm...
Im lost...
04-06-2007, 06:21 PM
#3
Originally Posted by sevanseriesta
are you sure that you are getting enough fuel
Originally Posted by Blownramair
So we pulled the plug from the head and still had it in the wire and cranked the engine over... No spark from that plug?
04-06-2007, 07:56 PM
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No the tuning software does not show anything odd... otherwise we would have found out how to fix it? The tuner checked everything and we couldnt troubleshoot the problem... We checked the coils, fuses with the 12v battery/ volt checker... I know the ignition is grouned in the back of each head and dont know if something happend to them (too damn hott and couldnt see)...
Im stumped - he's never had this happen and I sure havnt...
Either way - I have one week to figure it out and git r' tuned...
Im stumped - he's never had this happen and I sure havnt...
Either way - I have one week to figure it out and git r' tuned...
04-06-2007, 09:36 PM
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no... the thing cranks and cranks, but she wont fire... i dont think any electrical transmission is getting to the coils... I dont know why the engine would run for 3 hard pulls "pop/ stutter @ 5800" then not run...
I obviously hurt/ broke something or fried a sensor/ wire...
Oil PSI was good, oil temp was okay, h2o temp okay, had enough fuel psi... Any ideas guys?
I obviously hurt/ broke something or fried a sensor/ wire...
Oil PSI was good, oil temp was okay, h2o temp okay, had enough fuel psi... Any ideas guys?
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04-06-2007, 10:03 PM
#10
am i the only one whose making sense in this thread?its very simple
if he says
"Originally Posted by Blownramair
So we pulled the plug from the head and still had it in the wire and cranked the engine over... No spark from that plug? "
its an old school trick.you basically connect the coil to the wire to the plug and ground the plug to the chassis or hold it in your hand and if it doesnt spark you have electrical issues.not timing chain,mechanical,not fuel,not pump issues.its either as PSJ said a relay or something else electrical in the system thats off.
if he says
"Originally Posted by Blownramair
So we pulled the plug from the head and still had it in the wire and cranked the engine over... No spark from that plug? "
its an old school trick.you basically connect the coil to the wire to the plug and ground the plug to the chassis or hold it in your hand and if it doesnt spark you have electrical issues.not timing chain,mechanical,not fuel,not pump issues.its either as PSJ said a relay or something else electrical in the system thats off.
04-06-2007, 10:36 PM
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its electrical that im pretty sure of it... All's i know is when this thing is finally done... It's gonna be one bad ******... W/E the problem is, it's frustratin the **** outta me... I was thinking their was something i was ubruptly overlooking...
I'm not sure if i just find the most unique problems or just unlucky...
Atleast the good thing is i'll be able to somewhat keep up at Milan now...
I'm not sure if i just find the most unique problems or just unlucky...
Atleast the good thing is i'll be able to somewhat keep up at Milan now...
04-06-2007, 10:46 PM
#12
ok if u get power to the ecu and that it reads everything fine all the parameters and such thats a good start.u said u have power to the coils?if there is power to the coils they just arent energizing and then releasing to the wires/plugs.check all grounds.if u can a coil or 2 of urs on a buddys car to make sure they work.if the motor cranks ur starter and starter relay is fine.check the relay for the main ecu and check that the battery is grounded tothe chassis.if ur not getting spark just follow everything needed to achieve spark at the plug and go from there.
04-06-2007, 11:15 PM
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Originally Posted by ddnspider
ok if u get power to the ecu and that it reads everything fine all the parameters and such thats a good start.u said u have power to the coils?if there is power to the coils they just arent energizing and then releasing to the wires/plugs.check all grounds.if u can a coil or 2 of urs on a buddys car to make sure they work.if the motor cranks ur starter and starter relay is fine.check the relay for the main ecu and check that the battery is grounded tothe chassis.if ur not getting spark just follow everything needed to achieve spark at the plug and go from there.
the chances of it being something indepth or in the tuning is minimal..
what kind of crank are you running?? anychance you lost the reluctor wheel??
Mike
04-07-2007, 12:51 AM
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Originally Posted by ddnspider
its got to be something electrical if u have no spark from the coils to the plugs.does all the rest of the electrical on the car function and the software reads the ecu?
04-07-2007, 01:00 AM
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Originally Posted by blacktransam
theres no way possible he killed all 8 coils at once.. check your coil grounds.. or yes you may have broke a timing chain.. the cam sensor controls spark.. so either that sensor OR a broken chain causing the cam not to rotate could cause your problem..
the chances of it being something indepth or in the tuning is minimal..
what kind of crank are you running?? anychance you lost the reluctor wheel??
Mike
the chances of it being something indepth or in the tuning is minimal..
what kind of crank are you running?? anychance you lost the reluctor wheel??
Mike
What gets me is if a sensor is down wouldnt the computer pick that up and throw a code?
04-07-2007, 09:26 AM
#16
Originally Posted by blacktransam
theres no way possible he killed all 8 coils at once.. check your coil grounds.. or yes you may have broke a timing chain.. the cam sensor controls spark.. so either that sensor OR a broken chain causing the cam not to rotate could cause your problem..
the chances of it being something indepth or in the tuning is minimal..
what kind of crank are you running?? anychance you lost the reluctor wheel??
Mike
the chances of it being something indepth or in the tuning is minimal..
what kind of crank are you running?? anychance you lost the reluctor wheel??
Mike
are you getting 12 volts across the coils?
04-07-2007, 10:36 AM
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not necessarily.. if the sensor faded out or sent eratic signals yes.. but if the sensor all out failed its possible that no it wouldn't pick anything up.. i'm assuming theres no DTC's stored or otherwise..and i'm not saying the rank couldn't handle the power.. i'm wondering if the reluctor wheel could have moved off..
Mike
Mike
04-07-2007, 03:21 PM
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whats the odds that the factory computer got totally fried??? i'm not saying that it is, but could the car still crank over and other electrical parts still work if the computer is fried?
it seems kinda weird that it would be because everything else works on the car, im simply not getting spark to the coils...
All 8 coils were checked via 12v... all of them okay!
it seems kinda weird that it would be because everything else works on the car, im simply not getting spark to the coils...
All 8 coils were checked via 12v... all of them okay!