88 on 89 bad right?
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
88 on 89 bad right?
An 88 prom/ECM won't work on a 89 correctly on startup cuz of the no cold start, correct?
My 89 runs pretty good, but is a bitch to crank. Im using a 88 ECM.
-- Joe
My 89 runs pretty good, but is a bitch to crank. Im using a 88 ECM.
-- Joe
#2
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ECM's are the same, but you're correct, the '88 has the Cold Start Valve to add fuel, the EPROM in the '89 does not. The '89 EPROM adds fuel via injectors at cold starts. Could be the '88 EPROM is not giving enough fuel at startup.
But, many have mentioned with thier '86-'88's they have removed the CSV and still use the stock EPROMs, and don't have starting issues...maybe your problem lays somewhere else?
But, many have mentioned with thier '86-'88's they have removed the CSV and still use the stock EPROMs, and don't have starting issues...maybe your problem lays somewhere else?
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If you have an 89, you can use the 88 ECM but not the 88 Memcal (as mentioned by Mike). My suggestion would be to purchase a 1989 Memcal, if you aren't using it already.
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Hey,
Thanks for the response.. Once its started it runs ok. I've got a weird floating idle tho. Sometimes it idles around 700rms. Other times it bounces way up to 1700..
I have a SLP camshaft. I think its like 212/214. 355cid, with sportsman II heads..
My ECM unfortunately is from an 88 cuz I don't have an 89 ECM. I'm wondering if the prom is just freaked.
I'm also wondering if I should just buy a prom burner and start messing with images. I havn't burned computer proms in years (wasnt for cars) but I think I could get the hang of it for cars.
- Joe
Thanks for the response.. Once its started it runs ok. I've got a weird floating idle tho. Sometimes it idles around 700rms. Other times it bounces way up to 1700..
I have a SLP camshaft. I think its like 212/214. 355cid, with sportsman II heads..
My ECM unfortunately is from an 88 cuz I don't have an 89 ECM. I'm wondering if the prom is just freaked.
I'm also wondering if I should just buy a prom burner and start messing with images. I havn't burned computer proms in years (wasnt for cars) but I think I could get the hang of it for cars.
- Joe
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
The memcal is part of the prom or is the prom or?
The whole ECM came out of a 350 formula, but 88..
Im gonna start reading up on burning proms.
-- Joe
The whole ECM came out of a 350 formula, but 88..
Im gonna start reading up on burning proms.
-- Joe
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Thanks Max.
I think I'm gonna get involved with burning proms. Figure it'll cost me like 250-300.00 or supplies. Then I can start tinkering with things.. If I buy proms they'll cost 100-150.00 a wack anyway so might as well make my own.
-- Joe
I think I'm gonna get involved with burning proms. Figure it'll cost me like 250-300.00 or supplies. Then I can start tinkering with things.. If I buy proms they'll cost 100-150.00 a wack anyway so might as well make my own.
-- Joe
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<font face="Verdana, Arial" size="2">Originally posted by anesthes:
Thanks Max.
I think I'm gonna get involved with burning proms. Figure it'll cost me like 250-300.00 or supplies. Then I can start tinkering with things.. If I buy proms they'll cost 100-150.00 a wack anyway so might as well make my own.
-- Joe</font>
Thanks Max.
I think I'm gonna get involved with burning proms. Figure it'll cost me like 250-300.00 or supplies. Then I can start tinkering with things.. If I buy proms they'll cost 100-150.00 a wack anyway so might as well make my own.
-- Joe</font>
#9
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Hey Man,
So what direction did you go? I'm looking at the pocket programmer, an tunercat.. What do blanks cost for 85-89 ecms??
-- Joe
So what direction did you go? I'm looking at the pocket programmer, an tunercat.. What do blanks cost for 85-89 ecms??
-- Joe
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