88 GT 5.0 Headaches

mjlee4usmc · Mar 18, 2006

NEED HELP!! 88 GT 5.0 Headaches

I have an 88 GT that has been modified. I'm not sure what all was done to it as everything was done before I bought it. It did have a Holly 670CFM Street Avenger with a performer 302 intake, MSD 6A Ignition sysyem and MSD 8582 Distributor. Cam is not stock and the AOD was replaced with a C4 Pro Street trans.

It has been made back into an EFI system (only took the shop 7 weeks). Now I have the surge and idle stall. The shop that is working on it says it is the cam and trans causing the problem or possibly the ECU.

I think it has something to do with them installing 35lb injectors and that they don't have a clue as to what they are doing.

Any Better Ideas? This is my first Mustang and could really use the help.

-86GTStang · Mar 19, 2006

First, 35 lb injectors ? If not a blower is installed, you need alot of horsepower, running that big injectors, N/A. If your engine is around 450hp +, that injector size would bee ok. So, do you know what computer you got, and are the Mass air flow meter calibrated for #19, #24 or what size injectors ?

HISSIN50 · Mar 19, 2006

A complete list of what your set-up is and what was installed would be good. Where were 35's procured?

List what MAF, etc you are running.

Good luck.

poneypower89 · Mar 19, 2006

yea, if they just threw those big ol injector in there without a calburated maf... there are gonna be some issues with driveability. besides, 36lb injectors are far too large for an NA setup unless its making crazy power.

DMAN302 · Mar 19, 2006

Holy smokes that shop is jackin you around in a large way. If infact they've installed 35 pound injectors in a vehicle that is not super/turbo charged, then I would not only question their ablities...but get the car the hell out of there.

BaXTeR3221 · Mar 19, 2006

Yea you need to find a set of 19lb injectors quick. If the computer is an A9p, its for an auto so i dont think that would be your problem.

mjlee4usmc · Mar 19, 2006

The car was set up for 10 inch drag but plan to take it to Japan this summer so had to make it street legal again. Not sure on all the set up it was done before I got it. Tried to get my car yesterday but I will not take it off his lot without a receipt and all of my old parts. He sold my Edelbrock Performer 302 intake and K&N filter system. Plus he let a kid put my Holley 670 Street Avenger on hi car and caught it on fire.

mjlee4usmc · Mar 19, 2006

BaXTeR3221 said:
Yea you need to find a set of 19lb injectors quick. If the computer is an A9p, its for an auto so i dont think that would be your problem.

I got a set today but don't want that shop to install them.

poneypower89 · Mar 19, 2006

mjlee4usmc said:
The car was set up for 10 inch drag but plan to take it to Japan this summer so had to make it street legal again. Not sure on all the set up it was done before I got it. Tried to get my car yesterday but I will not take it off his lot without a receipt and all of my old parts. He sold my Edelbrock Performer 302 intake and K&N filter system. Plus he let a kid put my Holley 670 Street Avenger on hi car and caught it on fire.

GET YOUR CAR OUT OF THOSE BAD HANDS ASAP!!!!!! IM SERIOUS

mjlee4usmc · Mar 19, 2006

HISSIN50 said:
A complete list of what your set-up is and what was installed would be good. Where were 35's procured?

List what MAF, etc you are running.

Good luck.

Not sure what MAF is installed or where the 35's came from can't get a straight answer from this shop about anything. All I know is what was on the car before this shop got at it:

1987 T-top Ford Mustang GT: 302 HO Roller, MSD 6-A, MSD Billet Distributor,
K&N Filter, 670 cfm Holley Street Avenger, 2” Phenolic Spacer, Eldebrock RPM Air Gap Intake, Long Tube Headers, Duel Flow Master 40 Series, C4 Pro Street Automatic Tranny, 3.55 Posi Rearend, 4 Wheel Disc Brakes, Pulley Under Drive Kit, A/C & Smog Pump Eliminator Kit

mjlee4usmc · Mar 21, 2006

got my car back last night. car is surging so starting tomarrow I plan to try the list off of the sticky from 5.o tech. Ill keep you up to date on what works. Also the trans is not shifting right now. Something else to fix.

carbed87 · Mar 21, 2006

mjlee4usmc said:
got my car back last night. car is surging so starting tomarrow I plan to try the list off of the sticky from 5.o tech. Ill keep you up to date on what works. Also the trans is not shifting right now. Something else to fix.

about the tranny (and im not an auto tranny guy,, but my friend did a c4 swap on his 86 and had the same problem) you could check if the bands are loose, thats what kept happening to my friend with his ( username 86.4:10c4 or something like that)

troyGT03 · Mar 21, 2006

is your efi setup the original speed density or a mass air setup?

mjlee4usmc · Mar 23, 2006

troyGT03 said:
is your efi setup the original speed density or a mass air setup?

It is set up with the original speed density. I wanted Mass air but the shop installed SD.

DMAN302 · Mar 23, 2006

You got bent over..hope you feel better.

mjlee4usmc · Mar 23, 2006

DMAN302 said:
You got bent over..hope you feel better.

Not really...maybe after I get all the bugs worked out and she gets a new paint job..

Also has anyone out there heard of a folding/retractable mirror that will work no this year. No retract no can take with to Japan and that will suck after all I've been through to get it this far.

Thanks

93 331 GT · Mar 23, 2006

mjlee4usmc said:
Not really...maybe after I get all the bugs worked out and she gets a new paint job..

Also has anyone out there heard of a folding/retractable mirror that will work no this year. No retract no can take with to Japan and that will suck after all I've been through to get it this far.

Thanks

Which base are on and who did you take the car to. I am also a Marine. I've been in town for over eight years now. Maybe I could help you out. I'm at New River.

Jozey · Mar 23, 2006

dude i would sue there a$$

mjlee4usmc · Mar 24, 2006

93 331 GT said:
Which base are on and who did you take the car to. I am also a Marine. I've been in town for over eight years now. Maybe I could help you out. I'm at New River.

I'm on New River also and live there also in SNCO housing Can't miss the Blue Mustang. I took my car to Marline's Garage on Blue Creek School Road.

Mustang5L5 · Mar 25, 2006

mjlee4usmc said:
It is set up with the original speed density. I wanted Mass air but the shop installed SD.

There's your problem right there.

Speed Density computers only work with 19# injectors unless you burn a chip. Also, most aftermarket camshafts will not work with speed density.

You have to convert to Mass Air. You'll need a Mass Air EEC, a MAF meter and an IST Mass Air conversion harness which is about $35

http://www.mass-air.com/Products.htm

You could just swap the 19#ers on and see how that works, but if you have an aftermarket camshaft it still may not run right. Either way, no way should you have 35# injectors on a N/A car. With your setup, 24# would be the most i would run but i don't think you are at the power level to justify them yet. Stick with 19's

88 GT 5.0 Headaches

New Member

Member

"How long does it take to get help in here?

Now everyone in the world will know I wanna bang t

My mom says thanks for the pearl necklace.

Member

New Member

New Member

Now everyone in the world will know I wanna bang t

New Member

New Member

Member

New Member

New Member

My mom says thanks for the pearl necklace.

New Member

Member

New Member

New Member

That is…until I whipped out my Bissell

Similar threads

Privacy & Transparency

Privacy & Transparency