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3 Minutes Ago

JCampbell replied to a thread Throttle Body Backfire in GM EFI Systems

They are the Summit "Vortec" clones (SUM-151124). I'm running a Summit 226018 intake manifold and a Transdapt 2202 adapter. I had read about...

2 replies | 9 view(s)

31 Minutes Ago

1project2many replied to a thread Throttle Body Backfire in GM EFI Systems

Folks seem to apply the term "Vortec head" to different types of heads. If you are using the 8 bolt intake style heads they are much less...

2 replies | 9 view(s)

2 Hours Ago

JCampbell started a thread Throttle Body Backfire in GM EFI Systems

Fresh TBI swap onto a internally stock, Vortec-headed 350. Truck runs great, pulls great, sounds great, except for a hesitation/TB back fire...

2 replies | 9 view(s)

3 Hours Ago

Neukam replied to a thread 16197427, $OE, AMC 401, Oxygen sensor goes super rich does not move in GM EFI Systems

You need to double check this. Your gauge should be on your supply line and you should not have 12psi on your return.

12 replies | 415 view(s)

4 Hours Ago

rang-a-stang replied to a thread 16197427, $OE, AMC 401, Oxygen sensor goes super rich does not move in GM EFI Systems

Ok, all done! Had a bad rotor in the mix. O2 sensor works great now, and the truck runs well! On to tuning! Thanks everyone!

12 replies | 415 view(s)

6 Hours Ago

mecanicus replied to a thread spark advance in GM EFI Systems

Hi steveo it is an 16196395 and my bin is set to manual transmission! In the csv it was the park brake. So I think this signal will not work on the...

7 replies | 50 view(s)

6 Hours Ago

steveo replied to a thread spark advance in GM EFI Systems

park brake or transmission park/neutral? they're very different things. i've never seen an oldschool GM ecm where the park brake switch does...

7 replies | 50 view(s)

7 Hours Ago

mecanicus replied to a thread spark advance in GM EFI Systems

Hi steveo, your answer was too quick, I wanted to add this question: As well i saw that my park brake switch is on all the time. I know I havent...

7 replies | 50 view(s)

7 Hours Ago

mecanicus replied to a thread spark advance in GM EFI Systems

Hi Steveo, thank you for the quick answer. Yes i have already realized the Knock table in your trimalizer.I have 4 big knocks in there.When I...

7 replies | 50 view(s)

7 Hours Ago

steveo replied to a thread spark advance in GM EFI Systems

if it's knocking definitely remove some spark advance. if it still knocks there remove some more. if it still doesnt' go away you might have false...

7 replies | 50 view(s)

7 Hours Ago

mecanicus replied to a thread spark advance in GM EFI Systems

Hi Steveo, thank you for the quick answer. Yes i have already realized the Knock table in your trimalizer.I have 4 big knocks in there.When I...

7 replies | 50 view(s)

7 Hours Ago

blue68deville started a thread 8747 with moates adapter in Buy - Sell - Trade - Wanted

1228747 ecu setup for flash chips by Moates. includes one chip $50 shipped

0 replies | 11 view(s)

7 Hours Ago

blue68deville started a thread Burn 2 with 2 chips in Buy - Sell - Trade - Wanted

Burn 2 with 2 chips Worked great, haven't used it for a while $50 shipped

0 replies | 16 view(s)

7 Hours Ago

blue68deville started a thread Ostrich emulator in Buy - Sell - Trade - Wanted

Ostrich 2.0 with socket booster Worked great, haven't used it for a bit. $150obo shipped

0 replies | 14 view(s)

8 Hours Ago

blue68deville started a thread 454 TBI unit w/harness and ecu in Buy - Sell - Trade - Wanted

Selling a 93 454 tbi with harness, distributor, coil, knock module, and a 7747 ecu that has been converted by Moates. The only thing missing is the...

0 replies | 23 view(s)

8 Hours Ago

steveo replied to a thread I must be dense lol - I simply can't find where to read MALF Codes. in GearHead EFI Forum Support

actually adding new items to the ADX is pretty simple but you'd have to do this one manually. it'll be really fun to learn and you can share your...

7 replies | 123 view(s)

8 Hours Ago

steveo replied to a thread spark advance in GM EFI Systems

trimalyzer does have a knock analyzer built into it but knock analysis is as good as it gets, no tool will automatically tune spark (too dangerous,...

7 replies | 50 view(s)

10 Hours Ago

dave w replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

$OD is for the 4L60E, $OE is for the 4L80E The factory did not use the 4L60E with the 7.4 liter. Using two instances of TunerPro (side by...

38 replies | 785 view(s)

10 Hours Ago

mecanicus started a thread spark advance in GM EFI Systems

Hi everybody, is there a tool like trimalyzer for the spark advance table? I could convert my amc 304 engine to tbi.When I used the original...

7 replies | 50 view(s)

18 Hours Ago

typhoonss92 replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

daily driver in my case. Well my truck see's maybe 5-6000 miles a year. 90% is highway miles and the motor is 2yrs old. ultimately this will be a toy...

38 replies | 785 view(s)

18 Hours Ago

dave w replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

Attached is the PE Active AFR's for a 16197427 Daily Driver. It would be awesome to compare AFR's screen shots from other tuner members. I think...

38 replies | 785 view(s)

19 Hours Ago

Xnke replied to a thread Anyone worked with the 16196397 yet? in GM EFI Systems

Man things have been rough with this lately. Bought the new laptop, then the garage flooded three weeks later and it got drowned. Just now got it...

344 replies | 101571 view(s)

19 Hours Ago

dave w replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

The link to gearhead-efi TBI injector flow rates: ...

38 replies | 785 view(s)

19 Hours Ago

typhoonss92 replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

Thanks for all the info, guess there is no spring for the 20-26 range, there used to be a gold one that would do 16-26 from what I read but have not...

38 replies | 785 view(s)

19 Hours Ago

In-Tech replied to a thread Are all the 8 pin ignition modules that same? in GM EFI Systems

Awesome, I've seen quite a few that burn a minuscule hole through the rotor and sometimes idle fine but under load it takes the fire right to the...

16 replies | 320 view(s)

20 Hours Ago

rang-a-stang replied to a thread Are all the 8 pin ignition modules that same? in GM EFI Systems

IT WAS MY D@MN ROTOR!!!! I have a buddy here in town that has another AMC 360 so I took my cap/Rotor/wires, and adapter (we run the Ford...

16 replies | 320 view(s)

22 Hours Ago

Fast355 replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

Anything with a 7.4 and the 7427 used a 46 lb/hr injector @ 28 psi. Barely enough fuel to support a stock 5.7 Vortec much less anything making any...

38 replies | 785 view(s)

23 Hours Ago

dave w replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

I tune a daily driver 16197427 with two Oxygen Sensors, the factory O2 sensor and the WBO2. I do not use simulated NBO2 data. I tune a daily...

38 replies | 785 view(s)

23 Hours Ago

CadeJohnson58 replied to a thread 95 Impala new member in Introductions

So I can connect everything you mentioned and connect the laptop program with my cars connection and get lucky and not hurt anything? I can see live...

4 replies | 101 view(s)

1 Day Ago

dave w replied to a thread 7427 upgrade tuning help understanding in GM EFI Systems

Attached are more spreadsheet screen shots from the same combined data logs previously posted. Injector Duty Cycle should increase with engine...

38 replies | 785 view(s)