PorterDsm Posted December 2, 2019 Report Posted December 2, 2019 Car won’t start, if I crank long enough the car will backfire. Rpms move, trigger 1 and 2 come on, fuel pump and injectors are working. Any ideas?? Quote
Adamw Posted December 2, 2019 Report Posted December 2, 2019 Im not very familiar with the 2G platform as we never got them here in NZ, but a good place to start would be a short PC log of it cranking. Here's a vid showing how to set it up if you are new to it: https://www.youtube.com/watch?v=_P1LRANeO4A Can you give me a bit of info about the 2G - do they have wasted spark coils with ignitiors built-in like similar to an Evo8? Do they have a similar trigger to an Evo 8 cam & crank? I vaguely remember one of the USA DSM's had the cam sensor signal inverted compared to the Evo but I think that might have been the 1G. Quote
PorterDsm Posted December 2, 2019 Author Report Posted December 2, 2019 Yes it is a wasted spark system. only thing that looks off to me is my map sensor. I am running a Omni 4 bar, I selected the "4 bar" as my map sensor option and calibrated it. Car wont start log.llg Quote
Adamw Posted December 3, 2019 Report Posted December 3, 2019 Im not convinced the trigger is happy, there's a few trigger errors clocked up and the cranking RPM is bouncing between 155(normal) and 450(not normal). Can you do a trigger scope when cranking. Here's a quick video showing how: https://1drv.ms/v/s!AiYbYlZQuRHPmidU5V2CmTcv6t2y?e=B0Uvsg 8 hours ago, PorterDsm said: I am running a Omni 4 bar, I selected the "4 bar" as my map sensor option and calibrated it. You MAP appears to be reading correctly. There was a big spike in MAP when you first started cranking which caused the boost cut to kick in but I suspect that may have been a back fire? Quote
PorterDsm Posted December 4, 2019 Author Report Posted December 4, 2019 Yes it did have a back fire. I did the trigger scope and it doesn't appear like anything is happening but the rpms are still moving. I found out that my engine has the 95-96 cam sensor on it instead of the 97-99 cam sensor. The 97-99 cam sensor set up is the same as the evo 8. While thinking about it, the 95-96 (intake) cam sensor reads off of the cam gear side in which the cam is rotating clockwise also the way the sensor is reading. The 97-99 reads on the opposite side (passenger) of the same cam (intake) rotating counter clockwise. I read online about it and those did have to be inverted like you said. trigger scope log 1.llgWould that have anything to do with it?? trigger scope log 2.llg trigger scope 3.llg Quote
Adamw Posted December 4, 2019 Report Posted December 4, 2019 Did you click the capture button while the engine was turning like the video shows? These triggerscopes look like they were captured before the engine was turning. Or maybe the battery is flat and the PC is disconnecting during cranking? Does the green "online" indicator stay green while cranking? Quote
PorterDsm Posted December 4, 2019 Author Report Posted December 4, 2019 You're right, I got a reading this time. New trigger scope.llg Quote
Adamw Posted December 4, 2019 Report Posted December 4, 2019 Yeah, something wrong with your cam sensor/wheel, it appears to match the older Evo 1-6 pattern but it is upside down/inverted compared to an evo 1-6. It doesnt match the Evo 7-9 pattern at all. It will not work like this. You will need to find the correct evo style cam trigger. Quote
motomattx Posted December 5, 2019 Report Posted December 5, 2019 Have you tried swapping your plug wires 1and 4 with 2and 3 to see if it will fire? Quote
PorterDsm Posted December 5, 2019 Author Report Posted December 5, 2019 okay so I got the new cam sensor setup hooked up and took a new trigger scope. It sounds like it kind of wants to start now but still wont. trigger scope update.llg Quote
PorterDsm Posted December 5, 2019 Author Report Posted December 5, 2019 I never switched 1/4 and 2/3 but I thought about it. Instead I just checked spark under ignition. I turned IGN 1 on and both 1/4 were sparking strong, same with IGN 2 on, 2/3 were sparking. Just to humor the theory though I ran out there and switched them and the car didn’t want to even try to fire. The car acts like it wants to fire with wires the right way..... I’m open to any suggestions, just kinda stumped. Quote
Adamw Posted December 5, 2019 Report Posted December 5, 2019 Are you using Evo 1-6 triggermode? - You should be. Have you been through the "pre-start checks" in the manual - checked all sensors are reading correct, set base timing, adjusted master fuel etc? Quote
PorterDsm Posted December 5, 2019 Author Report Posted December 5, 2019 i have switched between the 1-6 and 7-9 both will not start the car, but ill leave it on 1-6. i did briefly go through the pre start checks. i didn't hook up the built in 3 bar map sensor, and did not adjust master fuel. I'm gonna go through it thoroughly today after work. The map sensor says its at 14.3 psi with the car not running?? Quote
Monster Posted December 5, 2019 Report Posted December 5, 2019 I had to swap the Fuel pump and AC clutch outputs in order to get my evo 8 to fire. Says it in the manual that you may need to do so. I had the same issues as you and that solved my problem. Quote
cj Posted December 6, 2019 Report Posted December 6, 2019 10 hours ago, PorterDsm said: The map sensor says its at 14.3 psi with the car not running thats normal. MAP = manifold ABSOLUTE pressure. so the ~100kpa / 14.5 psi of Barometric pressure is displayed as well. MGP is what you are probably use to which will be 0 at this point. Quote
motomattx Posted December 13, 2019 Report Posted December 13, 2019 If you lived local I would give you a hand with it. I would imagine your soaking your plugs with fuel right? Quote
PorterDsm Posted December 13, 2019 Author Report Posted December 13, 2019 I did pull the spark plugs and yes it was. I actually did get it running. It’s just a matter of getting the idle dialed in now. Quote
Caleb95 Posted January 6, 2024 Report Posted January 6, 2024 On 12/12/2019 at 10:47 PM, PorterDsm said: I did pull the spark plugs and yes it was. I actually did get it running. It’s just a matter of getting the idle dialed in now. What did you do to get it running? I'm having the same issue. I got it to quit back firing but can't for the life of me get it to fire up. What is you're trigger 1 and 2 set up as if you don't mind me asking? Quote
Adamw Posted January 7, 2024 Report Posted January 7, 2024 @Caleb95 You will be best to post some info about your problem along with a copy of your own tune/log/scope. This user's settings with a G4+ ecu are unlikely useful to you if you have a G4X. Quote
Boosted4g63 Posted March 19, 2024 Report Posted March 19, 2024 On 1/6/2024 at 9:48 AM, Caleb95 said: What did you do to get it running? I'm having the same issue. I got it to quit back firing but can't for the life of me get it to fire up. What is you're trigger 1 and 2 set up as if you don't mind me asking? Were you able to get the problem fixed? Just now, Boosted4g63 said: Were you able to get the problem fixed? I had the same problem, Im running the g4+ evo 8 on 2g as well. Quote
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