Hesitation?

Mean50 · 03-22-2001, 11:58 AM

My car has sort of a hesitation in it around 2000 to 3000 rpm. Someone told me that 30 lb injectors were too big so I took off my buddies 24# and his Pro-M 75mm and tried it. It would backfire through the intake when it was cold with his stuff on it. It feels like there is something restricting my car. Do I need to get a Programable ignition system for my car to eliminate this problem?

------------------
89 LX Coupe
306, 10:1 compression, Holley Heads, Intake, and Cam package, 70 mm Throttle body and Mass Air, 30 lb injectors, 255 lph fuel pump, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, Centerforce dual friction clutch, 4.10 gears
50-175 hp Nitrous Works kit, 5" Auto Meter Shift Light

MSTANGfromSN · 03-22-2001, 01:41 PM

Sorry need a bit more info than you provided.

Does it feel like a misfire, is it just lazy then wake up, does it pull then fall on it's face, does it feel like it's loading up on fuel...ect ect...

Let me know
laters
Mike

03-22-2001, 11:31 PM

my car is doing about the same thing.. figure it out cause it is driving me crazy.. I have 24lb injectors and a 75 bullet.. it pops when its cold now but used to all the damn time.. it just feels lazy i havnt been able to really rip on it yet i only have 350 miles.. let me know I am stumped thanx

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SOLD THE 87GT, .. GT40, 70mmTB, 75mmBullet, 24lbinjectors, cold air induction, Edelbrok 6025 Rpm's, Inch phonolic spacer, tall FMSvalve covers, an SFI balancer, Canton 7quart, the shortblock... Lunati 51025 (224/232 .535/. 544 @112 deg) Ross lightweight pistons (10:1) Eagle H-Beams, Total Seal plasma Moly Rings, Clevite bearings, ARP throughout, FMS main Girdle&Studs, Forged Crank, of course HV-OilPump and hardened FMS shaft, Dual Friction centerforce, T5, and 4.10's Longtubes and 2.25 tail pi

Mean50 · 03-23-2001, 10:58 AM

Well my car acts just like the cam is loping, but it shouldn't be doing that at that rpm. Thought it was loading up on fuel so I tried the 24# injectors. It just feels lazy until you get to a certain rpm then you can feel it kick in. Something just isn't right. I have the upper intake off it now b/c I am not putting it back together until I get a plenum spacer for it. Would an MSD 6AL ignition system help?

------------------
89 LX Coupe
306, 10:1 compression, Holley Heads, Intake, and Cam package, 70 mm Throttle body and Mass Air, 30 lb injectors, 255 lph fuel pump, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, Centerforce dual friction clutch, 4.10 gears
50-175 hp Nitrous Works kit, 5" Auto Meter Shift Light

03-22-2001, 11:58 AM	#1
Mean50 Registered Member Join Date: Jan 2001 Location: Virginia Posts: 118	Hesitation? My car has sort of a hesitation in it around 2000 to 3000 rpm. Someone told me that 30 lb injectors were too big so I took off my buddies 24# and his Pro-M 75mm and tried it. It would backfire through the intake when it was cold with his stuff on it. It feels like there is something restricting my car. Do I need to get a Programable ignition system for my car to eliminate this problem? ------------------ 89 LX Coupe 306, 10:1 compression, Holley Heads, Intake, and Cam package, 70 mm Throttle body and Mass Air, 30 lb injectors, 255 lph fuel pump, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, Centerforce dual friction clutch, 4.10 gears 50-175 hp Nitrous Works kit, 5" Auto Meter Shift Light

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03-22-2001, 01:41 PM	#2
MSTANGfromSN Registered Member Join Date: Mar 2001 Location: Balto. MD Posts: 35	Sorry need a bit more info than you provided. Does it feel like a misfire, is it just lazy then wake up, does it pull then fall on it's face, does it feel like it's loading up on fuel...ect ect... Let me know laters Mike

03-22-2001, 11:31 PM	#3
87GTman Guest Posts: n/a	my car is doing about the same thing.. figure it out cause it is driving me crazy.. I have 24lb injectors and a 75 bullet.. it pops when its cold now but used to all the damn time.. it just feels lazy i havnt been able to really rip on it yet i only have 350 miles.. let me know I am stumped thanx ------------------ SOLD THE 87GT, .. GT40, 70mmTB, 75mmBullet, 24lbinjectors, cold air induction, Edelbrok 6025 Rpm's, Inch phonolic spacer, tall FMSvalve covers, an SFI balancer, Canton 7quart, the shortblock... Lunati 51025 (224/232 .535/. 544 @112 deg) Ross lightweight pistons (10:1) Eagle H-Beams, Total Seal plasma Moly Rings, Clevite bearings, ARP throughout, FMS main Girdle&Studs, Forged Crank, of course HV-OilPump and hardened FMS shaft, Dual Friction centerforce, T5, and 4.10's Longtubes and 2.25 tail pi

03-23-2001, 10:58 AM	#4
Mean50 Registered Member Join Date: Jan 2001 Location: Virginia Posts: 118	Well my car acts just like the cam is loping, but it shouldn't be doing that at that rpm. Thought it was loading up on fuel so I tried the 24# injectors. It just feels lazy until you get to a certain rpm then you can feel it kick in. Something just isn't right. I have the upper intake off it now b/c I am not putting it back together until I get a plenum spacer for it. Would an MSD 6AL ignition system help? ------------------ 89 LX Coupe 306, 10:1 compression, Holley Heads, Intake, and Cam package, 70 mm Throttle body and Mass Air, 30 lb injectors, 255 lph fuel pump, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, Centerforce dual friction clutch, 4.10 gears 50-175 hp Nitrous Works kit, 5" Auto Meter Shift Light