Question about 1991 Audi Quattro

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Injectors are cracking the ceramic tops

Need to know how to take apart a fuel injector on a audi quattro 90 20 valve

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These are hitachi injectors and are horribly engineered..Replace them with modern bosch injectors:
http://www.034motorsport.com/product_info.php?cPath=24&products_id=329

Posted on Sep 16, 2009

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Posted on Jan 02, 2017

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I have a99 Quattro a4 2.8 I just put a motor in it. it has good spark and is getting fuel.very time u try to start it. it floods the cylinder and cranks over hard remove fuel pump fuse turns over fine


Sounds like you have either a shorted fuel pump driver ground or a sticking fuel injector or injectors. Remove the injector electrical plugs and see if it still flood if it does then then one or more injectors are defective, if not then the engine wiring harness is grounded to one or more injectors or the PCM (powertrain control module) is defective. Remove the spark plugs to ID which cylinder is defective, disable the ignition system when you do this or the gas squirting out the spark plug hole can ignite (been there)

Oct 10, 2016 | 1999 Audi A4

1 Answer

99a4 Quattro 2.8 just changed motor cranks over won't start fuel reaching fuel rail no start


You need to check and see if the engine has injector pulse from the ECU

Sep 22, 2016 | Audi A4 Cars & Trucks

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Hello all , my discovery 1 300tdi immobiliser has stopped the fuel injector pump from pumping fuel to the injectors, it cracks over but no fuel these fuel coming to the pump been pushed by the lift pump...


You can reset the immobilisor with the key ,you should have the code in the handbook ?? you turn the key so many clicks to the right and left as per the instructions in the book ,Depending on the year its possible to bypass the little electronic lock inside the housing on the injector pump ,but you may need to remove the injector pump to do this ,then remove the shroud thats held on by bolts with the heads sheered off ,inside their is a valve ,now toy will have 3 wires in the loom to the pump and one is a 12v supply via ignition switch and you will need to remove the shroud and run this wire direct to the solonoid valve bypassing the funny little electronic gizmo type thingy .Very good at this i dont even know the proper name but i do know how to do this trust me ,another way which i wouldnt recoment is to use a radial cutter on the top part and then pull the wires out with a hookey type home made tool but it is very difficult to do and i would advise you to remove the injector pump and just leave the shroud off

Nov 19, 2013 | Cars & Trucks

1 Answer

Can anybody tell me how to change fuel injectors on 1989 audi 200 quattro?


first relief fuel pressure before disconnecting fuel lines remove fuel pump fuse or relay start engine let it idle until stall out lack fuel fuel now fuel pressure is reliefed. you have to remove top upper air cleaner housing, you have to remove whole entire air cleaning system because the fuel lines with fuel injectors is under the air cleaner filament you have to remove entire fuel line with fuel injector in order to replace fuel injector.

Nov 21, 2011 | Audi Cars & Trucks

2 Answers

Hi, I have a 98 Audi Quattro wagon. I put Gunk fuel injector cleaner into my empty gas tank, hoping this will improve pedal to the medal. No changes. How can i get more power? Thanks!


Very broad question, but maybe a tune-up, if needed. Fuel injector cleaner does not give more power. Use proper octane fuel rated for your car. If it requires more than just regular 87 octane, then you might restore a little lost power by using proper octane fuel.

Apr 26, 2010 | Audi A6 Cars & Trucks

1 Answer

Audi 5000 Quattro S - just bought it, driven to property, was sitting for 3 years in Ariaona, won't start. Sparkplugs spark, but gas seems to not have much pressure at the fuel filter; other than the fuel...


if the fuel is getting past/through the filter and to the distributor head ,make sure all lines are on fuel pump inside tank ( access under floor inside trunk ) also see if the is fuel to the injector lines, undo a line and see ,check for fuel at the cold start injector.poor fuel pressure can be a pressure regulator issue ( small gey box attached to fuel dist head attached by 2 screws )

Nov 05, 2009 | 1985 Audi 5000 S

2 Answers

Have a 1999 Audi A6 quattro, changed the fuel filter and bled the line. Car won't start. Has fuel all the way up to the rails. Is there a fuel pressure release/switch that is on the injector rails?


did you plug in the fuel pump at the fuel pump. did you cycle the key off and on at least 5 times check the plug at the fuel pump first to see if its still plugged in

Aug 12, 2009 | 1999 Audi A6

1 Answer

Miss fire and lean codes


i have lost my mobile

Apr 17, 2009 | 2004 Audi A4

1 Answer

Mis-Fire Cyclinder #2


I WOULD GO FOR THE FUEL INJECTOR ON CYCLNDER 2...IF YOU NEED MORE HELP GET BACK TO ME!!!

Feb 25, 2009 | 2005 Audi A4

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