LT1 Mechanic Needed

Murph Tang · 02-15-2023, 09:12 AM

My Brother in Law has a 94 sweet Caddy Fleetwood that has been parked for 8 months. I'm wanting to buy it from him as it has only 82k.

It did run when parked but with a new battery it turns over but not firing up. I unfortunately don't have much time to turn wrenches much anymore.

Curious if anyone knows an old school mechanic shop that knows these motors.

Thanks in advance

ram57ta · 02-15-2023, 10:05 AM

I'd bet money on the POS unvented optispark.
I know them well, but I don't necessarily like to work on them.
93-94 LT1's had the first gen optispark which fail frequently due to just being a piece of shit OR the water pump leaked onto it, the 2nd gen from 95 up uses a vented optispark which is better, but still a piece of shit design. Have you checked all the fuses to see if the ECM is getting power, does the fuel pump prime with the key on?

lowthreeohz · 02-15-2023, 10:17 AM

yep, i'd start by looking at the optispark. did one on my 30th anniversary z, that was a beating

JC316 · 02-15-2023, 03:09 PM

They're not super complicated motors and especially easy to work on in the B body cars. As stated, the opti spark has likely shit the bed. It's a pain in the fucking ass on a Corvette or a Z28, but a cake walk on the fleetwood.

Grimpala · 02-15-2023, 03:44 PM

The opti is a huge culprit, as is the pig tail that leads to the water temp sensor on the WP, not the one in the head.

Murph Tang · 02-15-2023, 04:06 PM

Great thanks for all the info everyone. I'll check and see if we have spark, fuses and pump.

I work mucho hours and hope its not the opti.....but its a cream puff and want it to run.

Trip McNeely · 02-15-2023, 04:46 PM

Pics plz!

AnthonyS · 02-15-2023, 06:59 PM

I know a guy that can help you. He?s an old school LT1 guy in the DFW area. I can tell you how to reach him via PM.

It?s gonna be the Opti most likely.

Murph Tang · 02-16-2023, 05:22 PM

Quote:

Originally Posted by AnthonyS

I know a guy that can help you. He?s an old school LT1 guy in the DFW area. I can tell you how to reach him via PM.

It?s gonna be the Opti most likely.

Awesome Thank you!

ram57ta · 02-16-2023, 08:06 PM

Where's this thing located?
Hell it aint that damn hard to change out an optispark..assuming that is the culprit go ahead and prepare to change out the water pump, gaskets and maybe the thermostat while you're in there...water pump has to come off to change the opti anyway.

mustang_revival · 02-17-2023, 09:53 AM

Might as well throw a blower on it too, since you will have the wrenches out already and all

Murph Tang · 03-10-2023, 08:14 AM

While waiting for the other Fleetwood to be fix I came across and picked this one up. Put cold air intake and made it a "Corvette" motor.

Taking it to Lemons Rally next week. New wheels/tires coming Monday.

[IMG]

[/IMG]
[IMG]

[/IMG]

4EyedTurd · 03-10-2023, 06:46 PM

Fuckin nice!! You should daily that thing instead

Trip McNeely · 03-10-2023, 06:47 PM

Tub it and drag it! That things cool as shit.

cool cat · 03-10-2023, 10:49 PM

Nice to see a SHO hiding in the back.

Murph Tang · 03-13-2023, 10:47 AM

Quote:

Originally Posted by cool cat

Nice to see a SHO hiding in the back.

I still have 6 of them

Murph Tang · 03-13-2023, 10:54 AM

[IMG]

[/IMG]

New wheels also taught kiddo to how to rattle can the trim

scootro · 03-13-2023, 11:30 AM

make a coffin into a giant suboofer box!

Rick Modena · 03-13-2023, 04:06 PM

Quote:

Originally Posted by scootro

make a coffin into a giant suboofer box!

hahahahahahaha!

Phoenix · 03-13-2023, 08:54 PM

Quote:

Originally Posted by scootro

make a coffin into a giant suboofer box!

That could fit a couple of Clarion SRW8000 32" subs!

02-15-2023, 09:12 AM	#1
Murph Tang Time Served Join Date: Nov 2010 Posts: 704	LT1 Mechanic Needed My Brother in Law has a 94 sweet Caddy Fleetwood that has been parked for 8 months. I'm wanting to buy it from him as it has only 82k. It did run when parked but with a new battery it turns over but not firing up. I unfortunately don't have much time to turn wrenches much anymore. Curious if anyone knows an old school mechanic shop that knows these motors. Thanks in advance __________________ Murph Lots of cars that nobody desires

02-15-2023, 03:44 PM	#5
Grimpala Lifer Join Date: Jan 2003 Location: Rockwall Posts: 5,188	The opti is a huge culprit, as is the pig tail that leads to the water temp sensor on the WP, not the one in the head. __________________ G'Day Mate

02-15-2023, 04:06 PM	#6
Murph Tang Time Served Join Date: Nov 2010 Posts: 704	Great thanks for all the info everyone. I'll check and see if we have spark, fuses and pump. I work mucho hours and hope its not the opti.....but its a cream puff and want it to run. __________________ Murph Lots of cars that nobody desires

02-17-2023, 09:53 AM	#11
mustang_revival Lifer Join Date: Jan 2009 Location: Keeping that vibe alive Posts: 4,487	Might as well throw a blower on it too, since you will have the wrenches out already and all __________________ WRX

03-10-2023, 08:14 AM	#12
Murph Tang Time Served Join Date: Nov 2010 Posts: 704	While waiting for the other Fleetwood to be fix I came across and picked this one up. Put cold air intake and made it a "Corvette" motor. Taking it to Lemons Rally next week. New wheels/tires coming Monday. [IMG][/IMG] [IMG][/IMG] __________________ Murph Lots of cars that nobody desires

02-15-2023, 10:05 AM	#2
ram57ta Lifer Join Date: Jun 2005 Location: Duncanville Posts: 8,552	I'd bet money on the POS unvented optispark. I know them well, but I don't necessarily like to work on them. 93-94 LT1's had the first gen optispark which fail frequently due to just being a piece of shit OR the water pump leaked onto it, the 2nd gen from 95 up uses a vented optispark which is better, but still a piece of shit design. Have you checked all the fuses to see if the ECM is getting power, does the fuel pump prime with the key on?

02-15-2023, 10:17 AM	#3
lowthreeohz comment removed Join Date: Oct 2002 Posts: 27,843	yep, i'd start by looking at the optispark. did one on my 30th anniversary z, that was a beating

02-15-2023, 03:09 PM	#4
JC316 Lifer Join Date: Jan 2010 Location: Kaufman Posts: 5,886	They're not super complicated motors and especially easy to work on in the B body cars. As stated, the opti spark has likely shit the bed. It's a pain in the fucking ass on a Corvette or a Z28, but a cake walk on the fleetwood.

02-15-2023, 04:46 PM	#7
Trip McNeely Black Ac Join Date: Mar 2004 Location: Central Alabama Posts: 39,474	Pics plz!

02-15-2023, 06:59 PM	#8
AnthonyS Lifer Join Date: Sep 2004 Posts: 5,097	I know a guy that can help you. He?s an old school LT1 guy in the DFW area. I can tell you how to reach him via PM. It?s gonna be the Opti most likely.

02-16-2023, 08:06 PM	#10
ram57ta Lifer Join Date: Jun 2005 Location: Duncanville Posts: 8,552	Where's this thing located? Hell it aint that damn hard to change out an optispark..assuming that is the culprit go ahead and prepare to change out the water pump, gaskets and maybe the thermostat while you're in there...water pump has to come off to change the opti anyway.

03-10-2023, 06:46 PM	#13
4EyedTurd Lifer Join Date: May 2002 Posts: 3,469	Fuckin nice!! You should daily that thing instead

03-10-2023, 06:47 PM	#14
Trip McNeely Black Ac Join Date: Mar 2004 Location: Central Alabama Posts: 39,474	Tub it and drag it! That things cool as shit.

03-10-2023, 10:49 PM	#15
cool cat Lifer Join Date: May 2003 Posts: 16,772	Nice to see a SHO hiding in the back.

03-13-2023, 10:54 AM	#17
Murph Tang Time Served Join Date: Nov 2010 Posts: 704	[IMG][/IMG] New wheels also taught kiddo to how to rattle can the trim __________________ Murph Lots of cars that nobody desires

03-13-2023, 11:30 AM	#18
scootro Lifer Join Date: Jun 2002 Location: none of your fuckin business Posts: 15,691	make a coffin into a giant suboofer box!

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