1995 viper running issues

[Echoplex]

Hi here in Mesa Az
I have a 1995 rt10 dodge viper issue I was wondering on ideas .it sat for about 1yr with a full tank of gas and some sea foam .issues I’m having it was having a hard time starting I would have try 3 or 4 cranks and some time I’d have to dis arm the alarm ,horn would start to go off after multiple try’s cranking the car over even when I did the key on off 3 times to prime the fuel pump after it started in ran fine
So I decided to change the battery it is a costco battery I did try a different auto zone gold battery nothing changed I ran some cleaner chevron tech Ron and and some injector cleaner after doing that car started to run rough so I siphoned the gas and put new gas in it. Chevron 91%.
Still running rough so here’s a list of what I’ve done and it’s still running rough
New standard champion plugs
New plug wires
Oil change
New fuel filter
Both up ward O2 sensor
When I turn the key I do here the fuel pump activate I’ve put a screw driver to the fuel injector and there clicking correctly I’m wondering if they could be clogged or if there’s any other sensor that could be causing this
What I thought I had done with to much fuel cleaner was foul the plug but they where not fouled I don’t seem to have any check engine lights on the dash board
If there’s any club member in Mesa with an obd1 reader that would be great
If you guys have any ideas or thoughts I’d sure appreciate it
Thanks so much for any ideas and help Rob

 

[BoondocSaint]

Sounds like the PCM/ECU might need to relearn. There are a bunch of write ups on here about diagnosing and working through the fix for that.

 

[Echoplex]

Hi so when I looked that up I found that I have to take the positive side of the battery cable off leaving the negative cable still hooked to the battery and ground it out ?
So to ground it out what’s the best way to do that and thank you for the help I sure appreciate it

 

[99RT10GTS]

Hi so when I looked that up I found that I have to take the positive side of the battery cable off leaving the negative cable still hooked to the battery and ground it out ?
So to ground it out what’s the best way to do that and thank you for the help I sure appreciate it

That is correct. Also, Double check that you didn't cross any ignition wires. Do you have a Service manual? If not, I sell them once in a while...............

 

[daveg]

Does it appear to be mis-firing OR is the idle real low and wont Idle?
Did you try taking it for a ride to see if it clears up?

 

[Echoplex]

Hi so I take the positive battery cable off and ground it out made sure the battery cables where very clean even took the negative cable off the frame cleaned that took for ever to start horn and alarm would go off once I got got it started it was rough but stayed running
And now I have a check engine light
On and have know way to check that as know one has an obd1 reader
Thanks for looking in on the thread I do appreciate it

 

[Echoplex]

Hi so I think I figured the codes by doing the key three times and counting the flashes let’s hope correctly I think it’s
12 and 51 12 seems to be I discounted the battery and the computer is telling me that and 51 says lean fuel
I’m hoping it’s a fuel injector issue or something a lot easier than the fuel pump any thoughts would be welcome
Thanks

 

[daveg]

Check your fuel pressure at the Rail with a gauge.