My '02 GT is stalling & bucking, suggestions?

BryantD · 12-19-2002, 11:20 PM

I have an '02 GT 5-speed with a Novi 1000. I've added the 90mm Lightning MAF and relocated the IAT sensor between the blower & throttle body. I have a Diablo Delta chip tuned by Reinhart Automotive. One of my problem is when I engage the clutch my car will sometimes just quit. There isn't a pattern to it. Before the Novi it stalled like twice the 1st week I had it, then I went 15K miles without a single incident. Now since I added the Novi it happens frequently. My car also bucks when I maintain certain rpm's in certain gears; 3100 to 3500rpms in 2nd gear; 2700 to 3100rpms in 3rd gear & 3000 to 3500rpms in 4th gear. The lower the gear the worse the bucking. I'm thinking it could be several things; the MAF transfer functions are off some, the IAC is dirty, the spark plugs (NGK-7R6 with .033 gap) or possibly the fuel pump (255lph). Also it has been suggested that maybe too much air is going thru my K&N airfilter fooling the computer and causing flooding which is why the car is stalling. He suggested duct taping the K&N about halfway up and seeing if that solved the problem. What do you guys/gals think?

mlambrecht82 · 12-20-2002, 03:02 AM

I don't know about the stalling but I do know the answer to the bucking. It is your fuel pump. The REturnless fuel system mustangs don't like the 255lph pump that all the supercharger companies use. Something to do with the pulsing. Call Steeda and they will fix you like they fixed me. You need to buy either the '03 cobra fuel pump or have Steeda modify your baffle to fit twin fuel pumps in it. If I remember right $350 for the Twin Cobra and $400 for them to modify your baffle in to twin fuel pump set up. I did it to my car and it runs amazing. You will love it when the bucking finally stops. My car did it for about 8,000 miles until I got sick of it and decided to do something about it.
Both of Steeda's fuel pumps flow over 300lph so you will get plenty of fuel.
You don't know how lucky you are to find the answer to this question so easily, I searched litterally for months to get this fixed. Consider yourself blessed.
c-ya

12-19-2002, 11:20 PM	#1
BryantD Registered Member Join Date: Mar 2002 Location: Austin, TX Posts: 20	My '02 GT is stalling & bucking, suggestions? I have an '02 GT 5-speed with a Novi 1000. I've added the 90mm Lightning MAF and relocated the IAT sensor between the blower & throttle body. I have a Diablo Delta chip tuned by Reinhart Automotive. One of my problem is when I engage the clutch my car will sometimes just quit. There isn't a pattern to it. Before the Novi it stalled like twice the 1st week I had it, then I went 15K miles without a single incident. Now since I added the Novi it happens frequently. My car also bucks when I maintain certain rpm's in certain gears; 3100 to 3500rpms in 2nd gear; 2700 to 3100rpms in 3rd gear & 3000 to 3500rpms in 4th gear. The lower the gear the worse the bucking. I'm thinking it could be several things; the MAF transfer functions are off some, the IAC is dirty, the spark plugs (NGK-7R6 with .033 gap) or possibly the fuel pump (255lph). Also it has been suggested that maybe too much air is going thru my K&N airfilter fooling the computer and causing flooding which is why the car is stalling. He suggested duct taping the K&N about halfway up and seeing if that solved the problem. What do you guys/gals think? __________________ 2002 GT Convertible (5-Speed) Mods: 3.73 Gears Novi 1000 with Paxton Air to Air Intercooler Delta Chip (Tuned by Reinhart Automotive) 38lb Injectors 90mm Lightning MAF (threaded IAT sensor for Lightning and IAT plug from '93 Taurus wiring harness) relocated between the blower & throttle body 255lph Fuel Pump Autometer A-Pillar (Dual) with Vacuum/Boost Gauge & Exhaust Gas Temperature Gauge Motorcraft AWSF22C sparkplugs (.030 gap) Bassani X-Pipe with Cats Dyno #'s: 328.4rwhp & 340.9rwtq

12-20-2002, 03:02 AM	#2
mlambrecht82 Registered Member Join Date: Oct 2002 Location: Fresno, CA Posts: 101	I don't know about the stalling but I do know the answer to the bucking. It is your fuel pump. The REturnless fuel system mustangs don't like the 255lph pump that all the supercharger companies use. Something to do with the pulsing. Call Steeda and they will fix you like they fixed me. You need to buy either the '03 cobra fuel pump or have Steeda modify your baffle to fit twin fuel pumps in it. If I remember right $350 for the Twin Cobra and $400 for them to modify your baffle in to twin fuel pump set up. I did it to my car and it runs amazing. You will love it when the bucking finally stops. My car did it for about 8,000 miles until I got sick of it and decided to do something about it. Both of Steeda's fuel pumps flow over 300lph so you will get plenty of fuel. You don't know how lucky you are to find the answer to this question so easily, I searched litterally for months to get this fixed. Consider yourself blessed. c-ya __________________ _________________________________ 04 Cobra densecharger CAI BBK off road X pipe Custom Electronic Exhaust cut outs Tuning via Diablo Predator Ported and polished Throttle body and plenum Line locker (for the smoke shows) Stock boost 412 rwhp 379 rwtq

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