Ignition cut issue
07-09-2018, 12:21 PM
#1
Honda-Tech Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Murrieta, CA USA
Posts: 833
Likes: 0
Received 0 Likes
on
0 Posts
Ignition cut issue
First off, any and all help is appreciated as I have been chasing this issue for more than a month with no results.
91 Civic, B16 swap. Skunk2 Pro 1s, Skunk2 pro valve springs and tit retainers, arp head studs, stock bottom end.
Turbo Setup: Peakboost ramhorn, 38mm gate, gtx3582r, tial bov and precision 1000s AEM 340 ethanol pump
Tuning: s300 v3 brand new from Hondata. Car is on 12lbs on pump gas
The issue: The car has been boosted for some time and never gave me this issue until recently. The hose came loose on the fuel pump and the engine leaned out and it cracked ring lands on all 4.
I replaced the pistons with OE ones, same CR, same oem rods.
When I put the car back together it has an ignition cut right at 6800 rpms and will not push past it no matter what I do. The only way to get it to run past is to drop timing to 8 degrees and disengage high cam. Then it pulls through but it's a turd for obvious reasons.
All sensors are working and logging.
I've tried no less than 20 different maps, erasing the ECU, AFR from 13.0 to 10.0, Ignition timing from 8 degrees to 28 degrees. No change
I checked the ecu in a friends boosted B16 ef hatch, works perfectly
No CELs
3 different distributors, 3 different coils, 3 different cap/rotors, 3 new sets of NGK 7s gapped from .15 to .25
Compression cold is 160 across the board
I've also checked the wiring to the ecu for all the distributor pins and they are all there. The only ones that have any kind of resistance are the coil wires and I can't get a clear wiring diagram of where the coil wires go besides the coil and the ecu because they have a good amount of resistance on them.
Other than that, the car runs perfectly. I drive it all the time with zero issues other than the ignition cut. It feels just like spark is being blown out. Vtec crosses over smoothly. I've changed vtec cross over and no change. The only thing that felt like it helped a little was a brand new ACCEL coil which I've heard are junk. The car ran the smoothest with that coil but it still had the cut out.
Any suggestions on what to try next or what could be wrong? I sent the map and log into Hondata but they never got back to me. I've had other tuners look and they don't see anything wrong with the map either. The car never gets hot or does anything weird. It runs perfect until WOT 6800 rpms. Stops dead.
Thanks again for any suggestions
91 Civic, B16 swap. Skunk2 Pro 1s, Skunk2 pro valve springs and tit retainers, arp head studs, stock bottom end.
Turbo Setup: Peakboost ramhorn, 38mm gate, gtx3582r, tial bov and precision 1000s AEM 340 ethanol pump
Tuning: s300 v3 brand new from Hondata. Car is on 12lbs on pump gas
The issue: The car has been boosted for some time and never gave me this issue until recently. The hose came loose on the fuel pump and the engine leaned out and it cracked ring lands on all 4.
I replaced the pistons with OE ones, same CR, same oem rods.
When I put the car back together it has an ignition cut right at 6800 rpms and will not push past it no matter what I do. The only way to get it to run past is to drop timing to 8 degrees and disengage high cam. Then it pulls through but it's a turd for obvious reasons.
All sensors are working and logging.
I've tried no less than 20 different maps, erasing the ECU, AFR from 13.0 to 10.0, Ignition timing from 8 degrees to 28 degrees. No change
I checked the ecu in a friends boosted B16 ef hatch, works perfectly
No CELs
3 different distributors, 3 different coils, 3 different cap/rotors, 3 new sets of NGK 7s gapped from .15 to .25
Compression cold is 160 across the board
I've also checked the wiring to the ecu for all the distributor pins and they are all there. The only ones that have any kind of resistance are the coil wires and I can't get a clear wiring diagram of where the coil wires go besides the coil and the ecu because they have a good amount of resistance on them.
Other than that, the car runs perfectly. I drive it all the time with zero issues other than the ignition cut. It feels just like spark is being blown out. Vtec crosses over smoothly. I've changed vtec cross over and no change. The only thing that felt like it helped a little was a brand new ACCEL coil which I've heard are junk. The car ran the smoothest with that coil but it still had the cut out.
Any suggestions on what to try next or what could be wrong? I sent the map and log into Hondata but they never got back to me. I've had other tuners look and they don't see anything wrong with the map either. The car never gets hot or does anything weird. It runs perfect until WOT 6800 rpms. Stops dead.
Thanks again for any suggestions
07-10-2018, 08:45 PM
#4
Honda-Tech Member
Join Date: May 2008
Location: Southern Oregon
Posts: 1,892
Likes: 0
Received 0 Likes
on
0 Posts
Re: Ignition cut issue
Maybe it’s a mechanical issue related to vtec. What does your oil pressure do when vtec engages? Are you sure you installed the o-ring under the center cam cap when you reassembled it? Valve lash in spec too?
07-16-2018, 04:25 AM
#7
Honda-Tech Member
Re: Ignition cut issue
I didn't see anything glaring on the calibration or datalog. It looks like you just shifted right at 6800rpm... hard to tell what it is doing. What makes you sure it is ignition cut?
Are you sure vtec is engaging? You reinstalled the dowel pin thing under the cam cap? Mechanical timing is correct? Oil pressure good?
Are you sure vtec is engaging? You reinstalled the dowel pin thing under the cam cap? Mechanical timing is correct? Oil pressure good?
Thread
Thread Starter
Forum
Replies
Last Post
hybrdthry911
Forced Induction
24
11-18-2009 08:58 PM