Car is Acting Up.. Hesitation/Quit!! Help Fellas!

[KDK1988GT]

OK here is the scoop..

331, AFR 185's. 30 lbs Injectors, 75mm MAF Cal. for 19lbs Injectors. I run the TwEECer to tune my car.

New Wires, New Plugs, New Cap and Button, and I run a MSD 6AL & MSD Coil.

Here is the deal, I start the car it idels great. My A/F gauge is in the stoichiometric range.

I place the car into 1st gear, start to drive it seems to run good then as I get into the gas... its like I hit a brick wall the car falls on its face, not all the time but sometimes. I was driving on the highway today crusin along and I could feel a small hesitation as I'm driving & then sometimes it would also most all out wanna quit, after the bigger surge/hesitation.... I could smell a rich gas mixture.

Last year my MSD box failed me (my car would not start at all) so I sent it back to MSD they fixed it. I put the box back on my car two weeks ago and everything worked great. But now I have this prob. Could the MSD be causing this (hesitation/quitting feeling)? Would the box be cutting spark and thats the feeling I'm getting... of hitting a brick wall and then the smell of fuel.

Or would you guys think that it might be my MAF meter..... I know I should have one Cal for my right size injectors but with the TwEECer I can over come that for the time being. In the future I would like to get a bit bigger MAF with the 30lbs calibration.

I have not changed anything on the car besides the MSD box in the past couple weeks.. I'm still using the same tune that I was last year and the car ran fine.. and ran fine until now...

Any suggestions/experiences would be great to hear.

Thanks again,
Kris

 

[90lxfoxbody]

i had a similar problem with a jacobs ignition kit i bought when they first came out with the kits specific for the 5.0. i put my stock ignition stuff back on and it fixed the problem immediately. so for me the ignition would be the most likely suspect. good luck man.

 

[KDK1988GT]

i had a similar problem with a jacobs ignition kit i bought when they first came out with the kits specific for the 5.0. i put my stock ignition stuff back on and it fixed the problem immediately. so for me the ignition would be the most likely suspect. good luck man.

yeh I was thinking of taking the box off the car 1st and then seeing what it does...

 

[KDK1988GT]

Update

Ok well took the box off... still having the prob....

Now at Idel the car will idel for a bit then wants to quit and I hear a noise like the car is taking a big gulp (kinda like a blow off valve on a turbo car) of air and then wants to die again..
Also once the car reved up to 2000 RPM with out me even touching the gas!! and then came back down and started doing the same as above all over again..

I'm starting to think that its the MAF!

and like I said before I'm running the same tune as I did last year and it worked fine

 

[KDK1988GT]

ok I've been back in the house for a bit now.. thinking about this..

U think it might be a bad fuel pump going on me???

I had it started and I noticed that the fuel pressure was moving alot !! and the more I remember from today.. the AF gauge was not acting like it should have been.. I would richen the MAF up and the AF gauge would not change at all...

 

[KDK1988GT]

BUMP

:SNSign: