anyone know?

WIN-ALDL, PROM BURNING, ERROR CODES, RPO CODES, SES LIGHT, CHECK ENGINE LIGHT, VIN INFO, FACTORY INSTALLED OPTIONS LIST
Post Reply

Topic author
markmitchinnh
I sleep in my van
Posts: 589
Joined: Wed Oct 13, 2010 2:07 pm
Location: Barrington NH

anyone know?

Post by markmitchinnh »

I have a 7747 computer but I can't remember what I took it out of is there a way to tell? I think it came from a c30 chevy van with 350 TBI. If it did I can use it for the 350 I have almost ready to go in.
Recently bought a 1989 Astro RS from Florida. Replaced stock engine witha 1997 5.7 vortec with TBI and replaced transmission with rebuilt 700R4 with mild shift kit.
Bought on Monday the 16th of April 2012
User avatar

doyoulikeithere
ASV Supporter
ASV Supporter
Posts: 2060
Joined: Tue Nov 17, 2009 8:27 pm
Location: Misty Mountains of Cowichan BC.

Re: anyone know?

Post by doyoulikeithere »

markmitchinnh wrote:I have a 7747 computer but I can't remember what I took it out of is there a way to tell? I think it came from a c30 chevy van with 350 TBI. If it did I can use it for the 350 I have almost ready to go in.
It's the same 7747 box I have in my 5 speed 4x4 87 astrovan, with the 4.3. But tbichips.com lists it as the box for a truck 350.
So, you need to be sure the chip in the box is a V8 chip, not a V6 chip.
I bet there is a number on the actual chip in the box that might tell you more. tbichips.com could probably answer this one...
TBICHIPS.com wrote: performance chip for the service number 1227747 ECU used in GM 1/2 ton Trucks manufactured between 1987 and 1991 with a 350 V8 engine. I have this chip for either the 5spd or automatic transmission. http://www.ebay.ca/itm/HOT-CHIP-Chevy-T ... 5d2cd7d1ff
2021 Yamaha Tenere 700 - Blue.
2016 Yamaha XSR900 - Silver.
1990 Astro - AWD - Brown.
1987 Astro - With 5 Speed & 4wd - Silver & Blue.

Topic author
markmitchinnh
I sleep in my van
Posts: 589
Joined: Wed Oct 13, 2010 2:07 pm
Location: Barrington NH

Re: anyone know?

Post by markmitchinnh »

I kept on searching and I finally found a site that tells by the numbers what chip is in the ECM and what size engine it goes to. It is a file not a website so I can try and figure out a way to add it here later.I have a 305 chip and a 4.3 chip and two ECM,s so I still need to find a 350 stock chip some where. So basically i need a chip, a TBI intake a few gaskets and a cat-converter to install my 5.7 and still pass California emissions. I will get all the engine stuff first then get the chip and the cat will be last. Wish me luck.
Recently bought a 1989 Astro RS from Florida. Replaced stock engine witha 1997 5.7 vortec with TBI and replaced transmission with rebuilt 700R4 with mild shift kit.
Bought on Monday the 16th of April 2012
User avatar

doyoulikeithere
ASV Supporter
ASV Supporter
Posts: 2060
Joined: Tue Nov 17, 2009 8:27 pm
Location: Misty Mountains of Cowichan BC.

Re: anyone know?

Post by doyoulikeithere »

Good Luck.
I tried a stage 1 chip from tbichips.com and it made a surprising improvement.
Did you get injectors for a 350? or what have you got for those...
2021 Yamaha Tenere 700 - Blue.
2016 Yamaha XSR900 - Silver.
1990 Astro - AWD - Brown.
1987 Astro - With 5 Speed & 4wd - Silver & Blue.

Topic author
markmitchinnh
I sleep in my van
Posts: 589
Joined: Wed Oct 13, 2010 2:07 pm
Location: Barrington NH

Re: anyone know?

Post by markmitchinnh »

yes I have the injectors sent them out to clean and rebuild, I sent them to www.witchhunter.com/
Recently bought a 1989 Astro RS from Florida. Replaced stock engine witha 1997 5.7 vortec with TBI and replaced transmission with rebuilt 700R4 with mild shift kit.
Bought on Monday the 16th of April 2012
Post Reply