It's About Time (Not MPH)

[Mark Yacavone]

Please see my post in S/SS Tech ..EFI Help Needed

Thank you.

[Tom Meyer]

You may what to look at your air inlet hose and filter. If that is a cone filter there is hp gains by just put a piece of tape on the end that we found on a wheel dyno with are 4 cly. Smooth bore hose and getting the length right is important. Tom

[Mark Yacavone]

Originally Posted by Tom Meyer

You may what to look at your air inlet hose and filter. If that is a cone filter there is hp gains by just put a piece of tape on the end that we found on a wheel dyno with are 4 cly. Smooth bore hose and getting the length right is important. Tom

Thanks, Tom. We tried some of that the other day.
First a 9" straight piece, then just 3 inches plus the filter.The engine would still miss and scatter off idle, once warmed up.
I "fixed" ,or fooled, i should say, that problem by taking the thermister / sender out of the water jacket and just having it plugged in and fastened outside the engine..
Now, the only problem is that when power shifted into 2nd, it sounds like I'm lifting the gas, but I'm not. I tried it at 6000, then again at 5500..Same deal.
I must mention, we're at 4600 ' , with a d.a. of 7300' .. I'm thinking that there's just not enough oxygen available in the intake when the shift pulls it down.
We're going to try it next week at Chandler, where the d.a. will be about half that.
Any ideas about this issue, anyone?

It is MAF, open loop, stock computer.

[Tom Meyer]

Lots of things is this a stock cam or a stocker cam? Is the ecm tuned to the new setup? Do you have good grounds to all components. Is there any codes, can you monitor AF ratio, what duty cycle are you injectors running. There is a lot of stuff going on, a trip to a wheel dyno is worth a lot, we change are whole power curve with small changes. Tom

[Mark Yacavone]

Originally Posted by Tom Meyer

Lots of things is this a stock cam or a stocker cam? Is the ecm tuned to the new setup? Do you have good grounds to all components. Is there any codes, can you monitor AF ratio, what duty cycle are you injectors running. There is a lot of stuff going on, a trip to a wheel dyno is worth a lot, we change are whole power curve with small changes. Tom

Stock, as in OEM cam.

ECM is bone stock . I have no way to crack into it,

Grounds? The whole engine and body is one big ground..(see thread)

No oxy sensor. No EGR. No vapor solenoids..Still, NO codes

Yes..A/F gauge

Duty cycle? Have no idea ..Stock 4 hole

One thing I am sure of.This car isn't getting an expensive tune up by someone else. Can't change anything anyway, except the fuel pressure

Thanks

[Greg West]

Are you using a MAP sensor? If so, you might try installing a potentiometer in the MAP sensor circuit so you can adjust the voltage from the MAP sensor to the stock ECU. Not sure if it works on a Ford, but it did work on a Mopar.

[Dave Noll]

These have an MAF sensor.