90Q owner, but maybe you guys can help. Stalling prob. Been 2 months now

big_anthoiny · 10-20-2007, 01:46 PM

Ok, I have a new MTFS,TEMP sensors and used ISV installed today from shokan. I've replaced all vacuum hoses and placed all new clamps. My intake boot has no cracks and looks fine. took out all my injectors and the spray nice and even? Car does not want to start, and stalls constantly. If I put my foot on the gas pedal the car will start and idle fine, no surging. But then you drive around and the car stalls and dies at every stop sign or stop light. Im not sure if I have a clogged fuel filter(4 months old) or what. I've checked timing 3 times, and vacuum about 10 times. it's all good. I just can not figure it out?

Thanks,
Anthony '89 90Q

yodasfro · 10-20-2007, 02:04 PM

big_anthoiny · 10-20-2007, 02:28 PM

Runs fine when rolling, no hesitation? Could it still be the filter.. I am thinking that may be it, not sure why

Thanks,
Anthony '89 90Q

boxerfan · 10-20-2007, 02:29 PM

Other than that I'd say it may be time to suspect the CIS dizzy or the ECU. Can you pull codes from your ECU?

itsav8 · 10-20-2007, 03:45 PM

cuatrokoop · 10-20-2007, 06:59 PM

itsav8 · 10-21-2007, 05:35 AM

big_anthoiny · 10-21-2007, 06:02 AM

If I unplug the O2 sensor, what will happen to the car, it will still start and run right?

thanks,

Anthony '89 90q

big_anthoiny · 10-21-2007, 06:49 AM

cuatrokoop · 10-21-2007, 05:05 PM

throttle and the 7A throttle. The 7A has idle, WOT and a TPS on it, which makes it nice to use when converting a 10vt to EFI. Just grab a ur-NF intake manifold and 7A throttle body w/connector.

10-20-2007, 02:04 PM	#2
yodasfro AudiWorld Super User Garage is empty, add now Join Date: Mar 2005 Location: CT Posts: 2,400	Fuel pump, fuel filter? __________________ Austin 92 urs4 91 200 20v 90 90q 20v 88 5ktq avant

10-20-2007, 02:28 PM	#3
big_anthoiny AudiWorld Member Garage is empty, add now Join Date: Mar 2003 Posts: 427	If it were the pump or filter would the car stumble when driving? Runs fine when rolling, no hesitation? Could it still be the filter.. I am thinking that may be it, not sure why Thanks, Anthony '89 90Q

10-20-2007, 02:29 PM	#4
boxerfan AudiWorld Super User Garage is empty, add now Join Date: Dec 2003 Posts: 5,485	WUR? Fuel tank empty? O2 Sensor? Other than that I'd say it may be time to suspect the CIS dizzy or the ECU. Can you pull codes from your ECU? __________________ Cheers; Boxerfan Toronto, Ontario CANADA 1983 Ur Quattro. RS2 Replica turbo, Custom 8.5:1 CR Pistons, sleeved block, MC2 cam, micropolished crank, shot-peened rods, 20VT HG, ARP Head Studs, Supertorque T-belt set up, BPV, Dual diaphragmed WG, chipped ECU, D-ported intake runners, 7mm stem Ti valves, aluminum oil pan, rear sway bar, 5-point harness. "Essica" Current project: 1983 Ur-Quattro Club Rally car. Still needs engine and transmission... and a number of other things. "Adam Bomb" ATTRITION LIST: 1987 Coupe GT. 98,000 original kms, tornado red. "Rosie". Sold. 1988 Olympic Edition 5000 CD Turbo Quattro Avant. "Red Devil" - Sold 1993 Audi V8 Quattro 5-speed conversion, IA chip set, short shift kit, full dual exhaust with 911 Turbo cats. "The Blue Meanie" - Sold 1990 Audi V8Q Pearl - Demolished. 1990 Audi V8Q Pearl - Sold 1989 Audi 200Q Black- "FrankenAudi" Alive again! - Deceased - Taken off the road by ERASE (Eliminate Racing Activity on Streets Everywhere) - Sent directly to crusher, do not pass GO, do not collect $200. 1989 Audi 200Q Avant Black - "FrankenVagen" Deceased May 7th, 2006 - Cause of death: Front end removed in collision - Boy in Ford Expedition SUV ran red light doing 70kph. 1989 Audi 200Q Sedan Tornado Red - "Cherry Bomb" Deceased January 19th, 2004 - Cause of death: Rear end collision - Girl on phone in Buick doing 80kph.

10-20-2007, 03:45 PM	#5
itsav8 AudiWorld Super User Garage is empty, add now Join Date: Jan 2004 Posts: 3,097	Idle part of the throttle possision switch??? __________________ thanx Ron 2.6l 20vt stroker motor W/O a roof 91 V8 5sp mit 4.2 aka Black Betty 91 200 20v 22psi 90 v8q 3.6 not stock...gone but not forgoten :-(

10-20-2007, 06:59 PM	#6
cuatrokoop AudiWorld Super User 1990 Audi Coupe My Garage Join Date: Nov 2001 Posts: 17,479	No throttle pot, just idle and WOT switches on the NG... __________________ http://coupe.gofergusons.org "SECRETARY OF ENERGY AND AE ASSWHIPPINGS: We call him when we need a big plane that kills people."

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10-21-2007, 05:35 AM	#7
itsav8 AudiWorld Super User Garage is empty, add now Join Date: Jan 2004 Posts: 3,097	Ok, wasn't sure if it was set up like my ol NF POWERED 5kq. __________________ thanx Ron 2.6l 20vt stroker motor W/O a roof 91 V8 5sp mit 4.2 aka Black Betty 91 200 20v 22psi 90 v8q 3.6 not stock...gone but not forgoten :-(

10-21-2007, 06:02 AM	#8
big_anthoiny AudiWorld Member Garage is empty, add now Join Date: Mar 2003 Posts: 427	Lots of fuel, New O2 sensors, no codes? If I unplug the O2 sensor, what will happen to the car, it will still start and run right? thanks, Anthony '89 90q

10-21-2007, 06:49 AM	#9
big_anthoiny AudiWorld Member Garage is empty, add now Join Date: Mar 2003 Posts: 427	CIS dizzy actually does what?

10-21-2007, 05:05 PM	#10
cuatrokoop AudiWorld Super User 1990 Audi Coupe My Garage Join Date: Nov 2001 Posts: 17,479	The NF is the same, idle and WOT switch...That is actually the only difference between the NF/NG throttle and the 7A throttle. The 7A has idle, WOT and a TPS on it, which makes it nice to use when converting a 10vt to EFI. Just grab a ur-NF intake manifold and 7A throttle body w/connector. __________________ http://coupe.gofergusons.org "SECRETARY OF ENERGY AND AE ASSWHIPPINGS: We call him when we need a big plane that kills people."

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