Question about 1992 Audi 80

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Hi, Cant normally start car (2.3l).filters,plugs,spark all ok,can crank just wont fire.once running all is well,runs like a kitten, i spray ether into the plennem chamber pipe and she fires and runs.yuor help would be appreciated

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Hi

Most likely one of 2 things, fuel pump failure or intemitent fault on fuel relay and/or fuse. they can melt rarely though!

Another option is the air mass sensor or MAF sensor that regulates the air to fuel mix, if this is a early 1992 model before september of that year then most likely the engine will run quite rich on fuel, modern fuels are slightly different and less harmful again can cause an issue.

Air or fuel is the ahort of it. also check that there is no holes in the air pipes and that all have a good seal with no leaks taking in too much air.

Regards

Dan

Posted on Dec 31, 2010

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1 Answer

Cranks but wont start


Likely a fuel delivery problem.

Check the filter, as it may be clogged and due for replacement. To test for fuel delivery, open your airbox and spray some starter fluid (purified ether, usually) down into the throttle body while someone else cranks the engine. If it fires up and runs for a few seconds but won't run without spraying the starter fluid, then you know you've got spark and compression. If that's the case, there could be any number of potential issues: throttle position sensor (not very common, but it does happen), fuel injectors clogged (common if you use low-grade fuel), fuel filter/strainer clogged (filters should be replaced every 30k miles or so, on average), fuel pump failure (you should hear a buzzing from the fuel pump when you crank the engine).

If the starter fluid doesn't help, then the problem is no spark. Check each plug/cable for fouling.

Feb 08, 2014 | Toyota RAV4 Cars & Trucks

1 Answer

Will crank and run fine when engine is cold go for drive come back wont start, new battery1 will turn over just like no fire is getting through1


could be a number of possible faults.1/crank sensor not working when hot,trace this and pour cold water on it(dont do this if it is not by crank pulley as water isnt good for modules etc) and retry.2/sparkplugs worn,but usually they would fault more on cold start.3/fuel pump cuts out when run,try wacking tank from underneath and retry.though I would concentrate on nil spark caused by a faulty ignition module or crank sensor.
Next time it fails to start.pull off a sparkplug lead,make a quick test plug with an old(but working)sparkplug.pull the side wire away from the center electrode 5mm and insert into plug lead.earth ground the plug on its thread against metal on the engine.crank and check for spark visually,don't be tempted to hold the plug while cranking.if nil spark we will have to test further which is faulty sensor.if it sparks ok we will need to test for fuel.
testing for fuel is easy.
when it fails,unclip air filter housing,while engine is being cranked,spray an aerosol based carburettor cleaner into air duct to engine,it should start and run while spraying and stop when you stop spraying if fuel delivery is the fault.fuel pump will then need testing/replacing.
be careful not to spray onto ignition or any areas of spark

Feb 11, 2011 | 1994 Lexus LS 400

1 Answer

Will not start--new battery,alternator,cam sensor,crank sensor,plug wires..gets fuel and spark,starter fine,cranks but wont start.


put a timing light on it. if in time then spray some ether in intake. if tries to run now its a fuel problem. make sure plugs are gapped properly. if you got timing,spark,gas at right pressure, and compression it should run.

Jun 21, 2010 | 1996 Subaru Legacy

1 Answer

Wont start, no spark anywhere


Check the spark, remove the fuse to the fuel pump and remove one of the spark plugs. Connect the plug to its lead and position it well away from the engine against the truck frame (do not hold it) and turn the engine over, check the spark. If no spark it most probably a faulty coil. Check the impedance of the spark plug leads and replace any that are much higher than the rest. My guess is that you have spark but no fuel, What?... OK this is what I think is wrong. Your pump is fine when at position 2 on the ignition switch however when you switch to position three to fire the engine the power to the fuel pump is momentarily disconnected. A leaking fuel pressure regulator or injector would drop the pressure in the fuel line and at the same time flood the engine making it impossible to start. Once you start the engine with ether the ignition is back to position 2 and the pump can make good any loss in pressure but because the intake mix is rich this will cause the engine to run rich too. A good fuel system is capable of delivering 40 - 50PSI of fuel pressure and when switched off up to 90% of this pressure should be maintained for about 5 minutes, if it cannot check out the fuel pressure regulator and injectors. The fuel pipe should be capable of filling a pint pot in about 15 seconds, if it cannot check out the fuel filter is clogged.
Hope the above gives you some pointers

May 21, 2010 | 1998 Chevrolet K3500

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1999 Dodge Intrepid 2.7L Replaced starter,


Here is a pic of a schrader valve. They all look about the same.3.jpg
If there isn't much pressure, cycle the ignition without turning the engine over and try again. If it is still weak, you may need a new fuel filter. If it is strong, you may have dirty or clogged fuel injectors.

It may be spark, but I'm inclined to think it is fuel related.

Good luck, and keep us in the loop!
JT

Mar 15, 2010 | 1999 Dodge Intrepid

2 Answers

Crank no start: has no spark and only has injector pulse on cyl # 1. if you spray starting fluid directly into throttle body car starts and stays running and has spark and inj. pulse. once you turn the car...


Fuel pump, you have to have press in the rail to fire all injectors- she will run on ether but not good for her. Ck your pump and any related fuses,relays,wiring.

Jul 11, 2009 | 2002 Hyundai Accent

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Need Help


have you checked the fuel pump?

Jan 06, 2009 | 1992 Buick Century

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2001 GMC Sonoma Engine stopped while driving


sounds like it could be plugged injectors or a timing problem.

Oct 27, 2008 | 2001 GMC Sonoma Extended Cab

1 Answer

Saab 900i 1992 model won't Start


sounds like a fuel problem check for spark and try to get the car running on ehter (aerosol starting fluid) spray it into the air intake (makesure not to spray the filter just take it out) and have a helping hand turn the key if the car runs, then its a fuel problem prbly the fuel pump, NOTE: When running only on ether the car will sound very funny this is normal, IF the car wont start problems are elsewhere such as a timing belt slipping, no spark, no compression, Bad coil, weak starter, bad valve ect etc HOPETHIS HELPS feel free to e-mail me at fixya@whypayforhelp.org

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