I have a 95 Camaro Z28 LT1. I cranks but only sputters and doesn't full start. I've replaced all of the ignition parts. It doesn't run better or worse with starting fluid. Any help advice would be greatly appreciated. Thank you

 

You replaced the ignition parts in an attempt to solve the problem? Did that included the Opti? Did you have any codes, or do any diagnostics before replacing the parts? Did you make any changes before the problem appeared?
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Well I bought it not really running and it sat for at least 3 years. I was told 1 year. I quickly found out the guy was very dishonest. I didn't not read the codes. I was under the impression obd1 doesn't give much info. Can buy a code reader if you think it will tell me something.

 

It fired better before I replaced the ignition parts. I put new ignition module coil opti plug wires plugs.

 

One way to learn about your “Camero” would be to spell the name correctly.

Did you do anything with the fuel system? Sitting 3 years with (most likely) 10% ethanol gasoline in it could have damaged the fuel pump, plugged the filter, damaged the fuel pressure regulator or messed up the injectors. System probably needs a good cleaning. Have you checked the fuel pressure?

What Opti did you buy? Right now there's only one decent product on the market - the Petris unit. Most everything else on the market are cheap Chinese rip-offs, often dead right out of the box. Even the high $$$$ MSD unit is a real crap shoot.

Don't sell OBD-1 short. I've written a 29 page guide to scanning the LT1. Add to that the Scan9495 software written by member GaryDoug, and you can data log the LT1 PCM, and produce a scan of 50 different sensors and operating parameters, at a rate of up to 10 lines of data per second. Very useful in spotting causes of problems. Then you can download (free) a copy of the 1995 factory service manual, with detailed multi-page descriptions of the DTC codes, with troubleshooting logic diagrams. Also courtesy of GaryDoug.

https://www.camaroz28.com/forums/com...-guide-886891/

https://www.camaroz28.com/forums/com...95-lt1-874306/

https://www.mediafire.com/?40mfgeoe4ctti

http://shbox.com/1/Dtcs.htm

Treasure trove of LT1 engine info:

4th Gen LT1 F-Body Tech Aids

 

I am a nice guy such as yourself is smart enough to know the email address of the correct spelling was long taken. Even 14 years ago when I created this Gmail. Thank you for the ribbing though. I checked the fuel pump replaced replaced the fuel filter. Does it need the correct fuel pressure to fully start? Or will it still half *** fire and not stay running? Also as I stated, I used starting fluid and it sill did exactly the same thing. I guess I will buy an obd1 reader. Do have a suggestion for that purchase?
thank you for your help. And a 1970 Camaro I can make run perfect. I know old stuff.i am old.my normal project is my 73 Chevrolet Blazer 4x4

 

I have no idea what your g-mail is. Read the first line of your original post.

 

I see pardon me. Lol my Gmail is 1970camero@gmail.com probably miss spelled it out of habit. Do you have a recommendation for an obd1 scanner to purchase?

 

OBD-1 scanners are hard to come by. Used units from AutoXray may still be around. There was probably a Snap-On that was decent, maybe available used.

There are dual OBD-1/OBD-2 scanners available, a bit costly. Avoid Equus and Innova because they contain a corrupt database for the LT1 PCM, and will typically show 7 false codes, including several that don't even exist.

The nice thing about Scan94/95 is the ability to pull codes, reset codes (including ABS and airbags), etc. Download is free, I can usually get the author to come in and help with any install or operating problems, just have to buy a reliable (read - "not cheap Chinese" components) data cable that accommodates the the 95's 16-pin connector.

I'm "old" too.... and grumpy . As you may have noticed, there's hardly anybody here any more.

 

That cable still needs a reader though correct?
also as long as the car has sat without running or battery will it still have info on it?

 

The PCM clears all codes when battery power is lost. But there are some codes that can set while trying to start the engine. There are some codes that can set while trying to start the engine that don’t turn on the SES light.

Scan9495 is software you download to a Windows laptop. Connect the laptop to the Data Link Connector. If you don’t have access to a laptop, you could still use a desktop PC, if you could move it close enough to the car to access the DLC with the cable. You just wouldn’t be able to drive the car and produce a data log of the PCM.

While the data log can be useful in the hands of someone with experience reading them, not real useful in the hands of a beginner. I've reviewed upwards of a thousand data logs for people, and have been able to find some fairly obscure problems. I've backed off from doing this because people refuse to follow my instructions for running the log, don't follow up on my request for added info, or simply drop off the thread because they didn’t get an instantaneous, easy to follow, one sentence solution to their problem.

 

Alright. I understand and won't ask for the download until I'm sure that I will use it. Thank you.
is there a test to see if my new opti is bad?
I really appreciate you taking the time to talk to me.

 

I may take it in to my friends shop and pay to have it diagnosed. No sure though. It will cost me 300 to 400 to have them check it out.

 

If you have spark at the plugs, the Opti is OK. Was it replaced? It's possible to throw the ignition timing off if it isn’t indexed correctly to the camshaft dowel pin.

Fuel system should prime to 40 PSI when the pump primes for 2 seconds and then shuts off. Pressure should hold, or drop very slowly. If it drops quickly the engine start will be delayed, but will start eventually.

 

Yes I replaced all of the ignition parts. New complete opti it I
is a summit racing opti.
Wouldn't it start with starting fluid if there is spark?