sr20det red top nothing but problems. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

89hatchman · 04-29-2013, 07:49 PM

So I tried adjusting the CAS to hopefully solve my misfire problem. I hooked up my timing light to the black wire on the back of the coilpack subharness and what do I see?

I see the light flashing like 40 degrees BTDC. So I rotate the CAS all the way counter clockwise as it'll go and it brings it to about 24 degrees BTDC. And now my car doesn't have any power what so ever after 3000 rpms.

I think I need to find somewhere else to hook the timing light to.

Also, it idles like shit. If I adjust the IACV screw it'll idle nicely at 800 where I set it. but randomly it'll misfire bad and drop to like 300 rpms. And when I'm driving and I let my foot off the gas with the tranny in neutral the engine will just flat out die.

I'm not getting any codes on the ECU either. Oh and also I got 100 psi straight across the board on a warm compression test. WTF. I'm hoping my compression gauge is shit, because if it isn't...then I just blew all this damn money on an engine I can't return now.

Dolby109 · 04-29-2013, 08:10 PM

Find a DOHC plug wire for like a honda or something (junk yard FTW)...just make sure its taller than the coil pack.
Strip the end of the wire and stick it up the coil pack, then plug it into your spark plug, and put your light on that plug wire.

89hatchman · 04-29-2013, 08:16 PM

Quote:

Originally Posted by Dolby109

Find a DOHC plug wire for like a honda or something (junk yard FTW)...just make sure its taller than the coil pack.
Strip the end of the wire and stick it up the coil pack, then plug it into your spark plug, and put your light on that plug wire.

ya, just read that. I"ll give it a try.

89hatchman · 04-29-2013, 10:19 PM

tried it. It worked but its misfiring. For some reason when the rpms go up cylinder 1 isn't firing. The light just stays dead until the rpms drop below some number (wasn't in the car so don't know the rpm)

ShadowMan · 04-30-2013, 01:25 AM

Well, you have got a starting point it sounds like. Maybe that coil is bad. Try using another coil from one of the other cylinders, hopefully that's it. Maybe you have a wire that is hanging on by only a couple strands or something, keep that in mind. Get back to us.

aga · 05-01-2013, 01:09 PM

that's what i did too , to adjust the ignition advance, though we ended up not going by the book, (match the strobe to the power fc) but by what the engine sounded sweet to us. works ok, the engine revs happily, no knock on the road (just cruising)

04-29-2013, 07:49 PM	#1
89hatchman Zilvia Member Join Date: Dec 2012 Location: In the west Posts: 295 Trader Rating: (0) Feedback Score: 0 reviews	sr20det red top nothing but problems. So I tried adjusting the CAS to hopefully solve my misfire problem. I hooked up my timing light to the black wire on the back of the coilpack subharness and what do I see? I see the light flashing like 40 degrees BTDC. So I rotate the CAS all the way counter clockwise as it'll go and it brings it to about 24 degrees BTDC. And now my car doesn't have any power what so ever after 3000 rpms. I think I need to find somewhere else to hook the timing light to. Also, it idles like shit. If I adjust the IACV screw it'll idle nicely at 800 where I set it. but randomly it'll misfire bad and drop to like 300 rpms. And when I'm driving and I let my foot off the gas with the tranny in neutral the engine will just flat out die. I'm not getting any codes on the ECU either. Oh and also I got 100 psi straight across the board on a warm compression test. WTF. I'm hoping my compression gauge is shit, because if it isn't...then I just blew all this damn money on an engine I can't return now.

04-30-2013, 01:25 AM	#5
ShadowMan Zilvia Junkie Join Date: Jul 2011 Location: oceanside, CA. Posts: 538 Trader Rating: (4) Feedback Score: 4 reviews	Well, you have got a starting point it sounds like. Maybe that coil is bad. Try using another coil from one of the other cylinders, hopefully that's it. Maybe you have a wire that is hanging on by only a couple strands or something, keep that in mind. Get back to us. __________________ in any situation....thou shalt blaze

04-29-2013, 08:10 PM	#2
Dolby109 Leaky Injector Join Date: Feb 2006 Location: Dayton, OH Posts: 85 Trader Rating: (0) Feedback Score: 0 reviews	Find a DOHC plug wire for like a honda or something (junk yard FTW)...just make sure its taller than the coil pack. Strip the end of the wire and stick it up the coil pack, then plug it into your spark plug, and put your light on that plug wire.

04-29-2013, 10:19 PM	#4
89hatchman Zilvia Member Join Date: Dec 2012 Location: In the west Posts: 295 Trader Rating: (0) Feedback Score: 0 reviews	tried it. It worked but its misfiring. For some reason when the rpms go up cylinder 1 isn't firing. The light just stays dead until the rpms drop below some number (wasn't in the car so don't know the rpm)

05-01-2013, 01:09 PM	#6
aga Zilvia Junkie Join Date: Mar 2013 Location: Athens, Greece Age: 46 Posts: 580 Trader Rating: (0) Feedback Score: 0 reviews	that's what i did too , to adjust the ignition advance, though we ended up not going by the book, (match the strobe to the power fc) but by what the engine sounded sweet to us. works ok, the engine revs happily, no knock on the road (just cruising)