Need Help

craig5.0 · 04-09-2002, 07:33 PM

Need some help here guys trying to figure out a problem. I've got a 89 stang with the following mods: Cobra intake(ported),65mm tb with a 73mm mass air,#24 injectors with a 190lph pump,tfs twisted wedge heads ported an polished,X303 cam,set of pistons running around 10.9:1 compression,aod trans with a lentech valve body.
Here's my problem: as soon as the car hits 6000(autometer tach) its like someone turned the key off,just dies. Pulls real hard until it gets there. Whatcha think? Fuel? electrical? None of the above. Help Please

Car runs 12.80@109(lentech convertor coming soon)

craig5.0 · 04-10-2002, 01:59 PM

help!!

Doctor DeBo · 04-10-2002, 04:57 PM

Sounds like you hit the rev limiter,keeps you from destroying things.This is normal

silver_pilate · 04-10-2002, 05:18 PM

Yeah...I'd say rev limiter as well.

The EEC-IV shuts fuel to the injectors at 6250 rpm. Also, if you don't have quality springs in your car, it's likely that you're getting some float before you even hit the limiter after about 6000. When your valves float even a little, raw fuel gets dumped into the exhaust system causing the O2 sensors to signal a rich condition to the computer which will then go into a full-lean metering to effectively slow the engine down.

If your tach is off a little, you're probably hitting the rev limiter. Otherwise, I'd guess it was springs. You've got plenty of fuel capability there with the 190lph pump and 24lb injectors, so I don't think that is the problem.

--nathan

craig5.0 · 04-10-2002, 06:29 PM

89's don't have a factory rev limiter though.

04-09-2002, 07:33 PM	#1
craig5.0 Registered Member Join Date: Sep 2000 Location: Halifax,Nova Scotia, Canada Posts: 30	Need Help Need some help here guys trying to figure out a problem. I've got a 89 stang with the following mods: Cobra intake(ported),65mm tb with a 73mm mass air,#24 injectors with a 190lph pump,tfs twisted wedge heads ported an polished,X303 cam,set of pistons running around 10.9:1 compression,aod trans with a lentech valve body. Here's my problem: as soon as the car hits 6000(autometer tach) its like someone turned the key off,just dies. Pulls real hard until it gets there. Whatcha think? Fuel? electrical? None of the above. Help Please Car runs 12.80@109(lentech convertor coming soon)

04-10-2002, 04:57 PM	#3
Doctor DeBo Registered Member Join Date: Feb 2000 Location: Newnan, GA, UnitedStates Posts: 83	Sounds like you hit the rev limiter,keeps you from destroying things.This is normal __________________ 92LX 5.0 Hatch,4.10 gears Auburn Pro,Mosser axels,alum drive shaft AOD hi ratio gear set,3200 stall TCI conv,Bassani long tube headers/cats,2 chamber flow masters,2.5inch exhaust,331 stroker,alum GT40 heads ported,Omega 1.7 roller rockers,JE forged pistons,Eagle rods,E cam,GT40 upper/lower intake,70mm mass,73mm Pro M bullet,MSD ignition,Cartech fuel sys w/external Aeromotive fuel pump,30lb injectors,Vortech S trim,Tubular front end,D&D coil overs up front

04-10-2002, 05:18 PM	#4
silver_pilate DURKA DURKA!! Join Date: Sep 1997 Location: Lubbock, TX...(TX panhandle) Posts: 1,418	Yeah...I'd say rev limiter as well. The EEC-IV shuts fuel to the injectors at 6250 rpm. Also, if you don't have quality springs in your car, it's likely that you're getting some float before you even hit the limiter after about 6000. When your valves float even a little, raw fuel gets dumped into the exhaust system causing the O2 sensors to signal a rich condition to the computer which will then go into a full-lean metering to effectively slow the engine down. If your tach is off a little, you're probably hitting the rev limiter. Otherwise, I'd guess it was springs. You've got plenty of fuel capability there with the 190lph pump and 24lb injectors, so I don't think that is the problem. --nathan __________________ '91 GT, Coast 347, 9.5:1 compression, full intake, Wolverine 1087 cam, exhaust, Keith Craft ported Windsor Jr. Irons (235 cfm intake, 195 cfm exhaust), AOD, PI 3500 converter, Lentech valve body, 3.73's (4.10's in the works), and Yokohama ES100's out back. Daily Car: '04 Infiniti G35 Sedan 6MT

04-10-2002, 01:59 PM	#2
craig5.0 Registered Member Join Date: Sep 2000 Location: Halifax,Nova Scotia, Canada Posts: 30	anyone? help!!

04-10-2002, 06:29 PM	#5
craig5.0 Registered Member Join Date: Sep 2000 Location: Halifax,Nova Scotia, Canada Posts: 30	89's don't have a factory rev limiter though.