BUT , like Mark said ; once the smoke comes out , there's no way to stuff it back in . That's a great analogy ; finding a NYC address or becoming the best NY cabbie. Be safe...Bob.

I was getting funny speed readings with my homemade 40-toothed sprocket , but it all cleared up when I installed one of Greg's custom 40-tooth wheels he had made . They're the cat's ass for VSS...

You gotta wonder what possible good would come from hacking this site , other than personal info ; what could be gained , just the thrill of the hack ? Bob

It seems that article just casually mentions the negative side of the circuit . If you must run bigger wire , run it from pump ground to engine block ; never enough ground wires. Stay suspicious...

How's that 60psi fuel pump gonna work on your Quadrajet ? LOL . I'd be checking the fuel pressure first ; sounds like it's away high . Be safe...Bob.

Exciting stuff to follow ; reminds me of the NASA space-folks prepping for their first Earth orbital flight. Lots of what-if's and how-bout's . Be safe...Bob.

Thanks again Mark . Bob

I've somehow lost the post for the 40-toothed VSS tone-wheel that one of our members posted , and offered for sale . I'll need 2 of them , but can't seem to run the post down in Search . I'd like to...

You guys have given me lots to think about , and I'll have to read what's on this BUZY chip that's supposed to be from a manual trans-V6-L35-vinW-CPI motor out of a 94 Blazer with a 16197427 ECM . ...

Jeeps and guns ; keep us updated on this experiment . Thanks for the correction , gentlemen. I'm on the right track now . Hope the Jeep survives . Be safe...Bob.

We changed the spider not 2 weeks ago on a 94 Blazer with "CPI" and it was a 5-speed . What trans inputs can there be for a manual trans ? There's no shift solenoids , no trans temp or pressure and...

What I'm trying to accomplish is simple ; I'd like to dump the ECM's 4L60E trans inputs , as I'm changing to a manual 4-speed . Can I just do that with a chip change to one from a manual trans truck...

That's what I needed to know ; thanks . I'll change my chip to the one from the manual CPI ECM , and start the tune from there ,looking for a manual trans Bin for CPI. Thanks . Be safe...Bob.

YOU'RE confused , 93 ? Long before I posted a question , I did as much homework as I could , reading lots of other related posts and studying my GM service manuals so I wouldn't be asking stupid...

[QUOTE=Six_Shooter;11257]93, he's wanting to use the CPI MEMCAL, to run TBI, because it has a mechanical or manual trans.
Thanks 93 and sixshooter ; I'm trying to ask about just switching...

I read a ton of posts , both here and the Moates site , but I still don't know what to call my FI system when asking a specific question . The system is 1995 Astro 4.3 Vortec ; GM calls it Central...

Thanks for the courtesy of a reply ; so I should call my 95-4.3 Astro fuel system "CPI" , even though GM named it Central Multiport Fuel Injection(CMFI) ? It's the one with the leaky spider and...

Can you keep us posted on your results ? I'm in a similar spot and can't seem to get straight answers, re ; TBI/CMPFI compatability for the same ECM, 16197427. I jus want to update the one ECM from...

Can't find CPI in the list of Acronyms and abbreviations ; this "Central MultiPort Fuel Injection" system was factory on 95 Astro van 4.3 engines. Am I just calling it the wrong name ? This is...

I just made mine from a 40-toothed 1/2" pitch sprocket , reshaped the teeth and cut the bore to 1.5" and mounted it on my front driveshaft yoke , with the VSS riding in the Muncie tailshaft . Your...

I've used the wrong system name ? The 95 Astro GM service manual # GMT/95-M/L-1 calls this fuel system "Central Multiport Fuel Injection" :I have no idea what your CPI might stand for ; Canadian...

The MPFI 16197427 ECM came with the 95 Astro 4.3 engine (auto trans) , and I bought another 16197427 ECM from a 95 S10 with a 4.3 TBI engine and manual trans. . The 2 mem-cals won't just switch ? I'm...

Sure would have been nice to see the problem resolved right to the end though ; the rest of us are still wondering WTF . Mark spent a chunk of his life on that Caprice too ; he probably would have...

Need an info byte or 2 ; I have 2 ECM's , both #16197427 , from different fuel systems , one MPFI , the other TBI . Will moving the mem-cal from the TBI unit to the MPFI unit be successful ? I'm...

You'll let us know how badly you fry that ECM , won't you ? Is bricking your ECM the same as "bricking" your camel , to get him to cross a 7-day desert ? The experiment will save a lot of us a ton...