2 step on fuel injected cars

[west coast]

2 step on fuel injected cars I have heard that the fuel injection systems do not like it very well. Anybody have luck with or problems like going lean while on the 2 step. Working with 5.0 Mustang but would think it would be the same as a GM F.I. car.

[7423]

I use a 2 step on my 5.0 auto Mustang stock EFI, work just fine, very consistent...............

[west coast]

Charlie I knew an old S/ST race would help out. How are you set up on the brake pedal or do you use where the brake light switch is.

[Jeff Teuton]

I'm not sure if the MSD 2 step and the fi systems always work. We had trouble with an aftermarket system, went back to footbrake, went faster. On others (360 magnum trucks), works fine, worth about .02 in 60'. We have had a little trouble on fuel pressure when leaving (about 1.31 60'). Bigger pump, better, have another pump to try this year. Appears the more power, the more problem.

[Chris "drooze" Wertman]

It all depends on the ECU and how its doing it, there is no deficincey of doing it in an FI system.

Depending on how its being done I can see Jeff could be right, but with an aftermarket ECU you can do spark, fuel, or both. If you do both....or fuel I could see an issue, if the ECU is doing its job right I can see having an issue.

If youre not doing it through the ECU itself I have no idea......all kinds of potential hiccups come to mind.

Originally Posted by west coast

2 step on fuel injected cars I have heard that the fuel injection systems do not like it very well. Anybody have luck with or problems like going lean while on the 2 step. Working with 5.0 Mustang but would think it would be the same as a GM F.I. car.

[7423]

Originally Posted by west coast

Charlie I knew an old S/ST race would help out. How are you set up on the brake pedal or do you use where the brake light switch is.

Home Depot door bell button on the brake pedal. MSD 2 step through a MSD 6A box. Works like a charm.

[west coast]

I am using a stock ECU 5.0 Mustang and was thinking on using a spare msd 7al2 i have laying around from my other car then just buy a 2 step. I am looking at using a mirco switch nuetral safety switch since i have spare laying around doing nothing and mount it to the brake pedal. just trying to be more consistant on the starting line. Thanks guys

[art leong]

I bought a seperate 2 step for my car (coil over plug system). Before the ECU manufacturer had the firmware done.
It worked just as stated cutting off the spark randomly. But the ECU was reading WOT and not doing anything about the fuel in conjunction with the spark.
My oil was fuel fouled in 2 passes (looked like it had thousands of miles on it). I was pressurizing the crankcase and pushing oil out everwhere.
Now my ECU manufacturer has finished the firmware. Got rid of the seperate unit. It works great no oil fouling or pressure in the crankcase. I can hit the button and hold it for a minute or more with no ill effects

[west coast]

Art are you saying you were pushing fuel past the rings then?

[art leong]

Originally Posted by west coast

Art are you saying you were pushing fuel past the rings then?

Exactly