More fail cyl 2 and 4 dont seem to matter
10-27-2015, 10:43 PM
#1
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More fail cyl 2 and 4 dont seem to matter
Ok so I am working to get the new engine running (diypnp) good at idle and I have tried new coils, injectors and firmware but it still is running on 2 cyl
So when I pull the coil on #4 the back most cyl nothing changes. When I pull #2 nothing changes. pull 1 or 3 and it dies.
I have listened to the injectors and they are firing. I have spark all 4 coils tested with light and extra plug.
Its the stock wiring for the injectors and changing to fab9 cop didn't help.
Sure seems like I am running on more cyl than 2 when driving.
Some times pulling the wire of # 2 seems to effect it but it really runs about the same at idle with 2 and 4 pulled as it does with the wires hooked up.
Same with pulling #4 injector plug.
Bought engine having seen it run and with compression test.
I am out of ideas.
So when I pull the coil on #4 the back most cyl nothing changes. When I pull #2 nothing changes. pull 1 or 3 and it dies.
I have listened to the injectors and they are firing. I have spark all 4 coils tested with light and extra plug.
Its the stock wiring for the injectors and changing to fab9 cop didn't help.
Sure seems like I am running on more cyl than 2 when driving.
Some times pulling the wire of # 2 seems to effect it but it really runs about the same at idle with 2 and 4 pulled as it does with the wires hooked up.
Same with pulling #4 injector plug.
Bought engine having seen it run and with compression test.
I am out of ideas.
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10-28-2015, 12:23 AM
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That interesting.
Wonder why I thought 1&4 and 2&3 like in the ignition.
Well on a side note it's something to do the vvt tuner. If I take it out of the loop the thing Req alot more fuel but it idle without missing and pulling 2 or 4 effects the idle. Plus afr are some what steady with in 1 point.
Will work on it tomorrow.
Sav man thanks that will give me some place to look.
Wonder why I thought 1&4 and 2&3 like in the ignition.
Well on a side note it's something to do the vvt tuner. If I take it out of the loop the thing Req alot more fuel but it idle without missing and pulling 2 or 4 effects the idle. Plus afr are some what steady with in 1 point.
Will work on it tomorrow.
Sav man thanks that will give me some place to look.
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10-29-2015, 01:24 AM
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Output test mode?
I will have to search that.
3 wires are shared between vvt tuner and diypnp
Signal
Positive
Negative
Ground issue?
I know there was a lot in the vvtunner instructions about grounds but that was 3 yrs ago. I will have to read thru again.
I also noticed the diypnp install instructions have been update with a post about 5v and a resistor.
I will contact them for more direction.
Thanks for yalls help.
I will have to search that.
3 wires are shared between vvt tuner and diypnp
Signal
Positive
Negative
Ground issue?
I know there was a lot in the vvtunner instructions about grounds but that was 3 yrs ago. I will have to read thru again.
I also noticed the diypnp install instructions have been update with a post about 5v and a resistor.
I will contact them for more direction.
Thanks for yalls help.
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