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beaver50
03-14-2018, 01:50 PM
94 ,z28 lt1,I was driving home n my car started to miss. It would miss then straighten up n run good then miss again.in and out like that. It's still doing it no codes.i know it could b many things. But what does anybody think might b going on






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Stormyweather
03-14-2018, 01:54 PM
Opti?. Plug wires? Is it a stumble like a fuel issue? Need more info.

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beaver50
03-14-2018, 03:41 PM
Opti?. Plug wires? Is it a stumble like a fuel issue? Need more info.

Sent from my HP Pro Slate 8 using TapatalkI think it's a fuel problem. If u really get into the peddle it straightens out. It's not like a plug wire electric problem.it idols good also

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Injuneer
03-14-2018, 05:43 PM
Did you actually scan it for codes, or are you basing “no codes” on lack of an SES light?
Stormyweather
03-14-2018, 05:57 PM
Idle fine clears up when you give it more? Well your going to need to give us more input. I


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beaver50
03-15-2018, 08:47 AM
Yes I scanned it

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beaver50
03-15-2018, 08:47 AM
I don't know what else to give u. That's what it's doing

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fullforce
03-15-2018, 12:14 PM
Fuel issue would (should) get worse with more engine load not clear up.

90% of the time a missfire in an Lt1 ends up being the opti... for me anyways But I keep fresh wires and plugs on my stuff.
Is it poping/backfiring or just going dead on a cylinder?
MoeHorsePower
03-16-2018, 06:15 AM
[QUOTE=fullforce;485997]Fuel issue would (should) get worse with more engine load not clear up.

^^^ what he says...
Sahara54
03-16-2018, 08:02 AM
Sounds like what mine was doing with my first opti...ran good under load but hesitated and stumbled off throttle. Went LTCC..all my little quirks I was having vanished.
beaver50
03-16-2018, 10:00 AM
Just dead

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Injuneer
03-16-2018, 11:35 AM
Are you saying the engine is now “dead”...... like it doesn’t run at all?
beaver50
03-16-2018, 12:58 PM
No just going dead ON A cylinder,I was having PCM trouble. So I sent off another PCM to b tuned by Solomon too replace the bad one. I put the one I got back on it. It started to miss. So I thought it was the PCM.it wasn't it still missed with the old one. So I swapped them back. It doesn't matter witch one it still misses

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SSlowBoat
03-17-2018, 12:22 PM
No just going dead ON A cylinder,I was having PCM trouble. So I sent off another PCM to b tuned by Solomon too replace the bad one. I put the one I got back on it. It started to miss. So I thought it was the PCM.it wasn't it still missed with the old one. So I swapped them back. It doesn't matter witch one it still misses

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beaver50
03-19-2018, 08:29 PM
It was that new a.c. Delco opti. Lasted no time. Anybody ever used a sac city opti.

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fullforce
03-20-2018, 06:58 AM
It was that new a.c. Delco opti. Lasted no time. Anybody ever used a sac city opti.

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another one bites the dust.

optis are a crap shot... Ive had $60 ebay ones last 2 years and ive had them be bad out of the box.
Same goes for the higher dollar ones.

Right now Im using a summit brand and it has been perfect for a year and a half
beaver50
03-20-2018, 06:59 AM
Im not sure what ill buy next

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Injuneer
03-20-2018, 09:30 AM
Sac City Corvette appears to resell the AIP (All Ignition Products) Opti's for $60 more than AIP sells them for. Previous AIP Opti's were a disaster. Not sure if they have improved them any.

Another possibility is the “Petris”. It was discussed in this thread. I don’t think F.G. bought one though.

http://ltxtech.com/forums/showthread.php?31354-Help-with-optispark&p=484894&viewfull=1#post484894
beaver50
03-20-2018, 11:40 AM
Thanks injuneer

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beaver50
03-20-2018, 12:56 PM
I rebuilt the a.c. Delco. I bought the piece that the harness goes into. I found it on here from a old thread. I hope it well work

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fullforce
03-20-2018, 03:01 PM
pretty sure the sensor inside is what normally goes bad
beaver50
03-20-2018, 05:38 PM
pretty sure the sensor inside is what normally goes badLet's hope

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