TunerPro User Forum

Hello, Can anyone answer some questions about TBI injectors. I bought an engine from an junk yard and the injectors on it are labeled: 5235209 on both, then one of them has 035 on it and the other has 045 on it. 1) I was wondering how I could figure out the flow rate of my 4.3 injectors? 2) Why do t...

Hello everyone, Did not get a lot of work done due to a nasty sinus infection, but it gave me time to think. Since there is very little information on getting started with megasquirt, I have decided to hook up the GM wiring harness. First question: I have the two 7477 ecus. Any recommendation on ano...

Tried some new stuff tonight and got some interesting results. Is it accurate to check your timing with a timing light while it is cranking? I unplugged the bypass wire from the megasquirt so there should be no timing advance; however, I can't get it to start and run like that so I put the timing li...

Thanks for the info. Right now I don't have a way of comparing temp vs. RPM. With the megasquirt they tell me I have to use tunerstudioMS software which is not real helpful and any information about megasquirt references a very out of date tunerstudioMS. I took the EGR valve off and everything check...

I played with that stuff a long time ago with my 4.3 safari van. What seems strange to me is you were running a 7747 computer on a 1995. Can you describe your application? I can probably find my old info for my van. I ran it with 2 different ECU's - the 1227747 (7747) and the stock 16144288 ECU. If...

Hello, I recently joined gearhead efi looking for some information for my 95 TBI 4.3 If anyone has any suggestions or help I would greatly appreciate it, even if it is converting back to my stock ecm; here is my story: I have a 95 4.3 TBI engine with a 01227747 that for a very long time have had an ...