Need help for 94z
11-09-2005, 10:32 PM
#1
Registered User
Thread Starter
Join Date: May 2005
Posts: 7
Need help for 94z
I just changed my starter Monday and now the engine is running poorly. It sat for 1 1/2 months before I changed it. The car is auto and stock. I was told it was out of timing but I don't know how to set timing on this car.About 5 months ago I changed the distributor, wires, plugs, and fuel filter. I have a chilton manual but they don't tell too much! Before the starter went out it wasn't running like this and I don't know what went wrong.Right after I changed the things it ran like a champ. I got msd distr. and msd wires. Any and all advice would be greatly appreciated!!!
11-10-2005, 09:36 AM
#2
Registered User
Join Date: Dec 1969
Location: PORTLAND, OR, MULTNOMAH
Posts: 3,499
Re: Need help for 94z
Are you sure it was the starter that was bad: and not the elec. system, including the alt. and battery? If it sat for that long and your battery wasn't any good or fully charged it may have been your battery and not your starter to begin with. You can't just bring a battery up to snuff by driving it after sitting for a few weeks, especially if it is old or not really powerful. You obviously have to have good juice to run properly. JMHO 
11-10-2005, 10:43 AM
#3
Administrator
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,669
Re: Need help for 94z
What does the volt meter on the dash show? Loss of voltage will screw up a lot of things, and can make it run rough. Maybe a short in the wiring to the new starter?
Did you unhook the battery cables when you did the starter R&R? That will have reset the long term fuel corrections in the PCM, perhaps making it seem to run poorly until the long term corrections are relearned.
Other than those two items, there not much changing the starter would make the engine run poorly.
Also a possibilty that the fuel "bad' from sitting for a while.
You can't change the timing on the LT1, unless you reprogram the tables in the PCM. If the Opti was installed with the splined shaft properly indexed to the cam sprocket, there is no way anything can be "out of time". If it ran great after the Opti, plugs and wires, there's nothing that letting it sit for a while, or changing the starter could have affected.
Did you unhook the battery cables when you did the starter R&R? That will have reset the long term fuel corrections in the PCM, perhaps making it seem to run poorly until the long term corrections are relearned.
Other than those two items, there not much changing the starter would make the engine run poorly.
Also a possibilty that the fuel "bad' from sitting for a while.
You can't change the timing on the LT1, unless you reprogram the tables in the PCM. If the Opti was installed with the splined shaft properly indexed to the cam sprocket, there is no way anything can be "out of time". If it ran great after the Opti, plugs and wires, there's nothing that letting it sit for a while, or changing the starter could have affected.
11-10-2005, 12:23 PM
#4
Registered User
Join Date: Nov 2003
Location: Mishawaka, IN
Posts: 1,771
Re: Need help for 94z
Take it for a drive and put some new gas in it. If things don't get better then go over your wiring again. If it was running fine before there's no reason anything should be wrong unless you messed something up with the wiring. Bad gas and/or a "dumped" ECM can be corrected by driving it and letting it relearn.
Thread
Thread Starter
Forum
Replies
Last Post
88IROC_Z
Computer Diagnostics and Tuning
2
07-22-2015 11:38 PM
whitehooptie
General 1967-2002 F-Body Tech
15
07-12-2015 06:10 PM