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Is or has the check engine light been lit?If so,you will need to get the codes retrieved from the computer to isolate the problem.Most parts stores will retrieve the codes for free.You can post back with the codes and I can help you isolate the problem.If there has been no engine light,you will need to proceed below to isolate which of the things needed to cause combustion are missing.Treat it as a no start condition and proceed below.

Here are the procedures to check for a no start on a fuel injected engine.It will require a couple diagnostic tools that you do nt most likely posess,but may be able to obtain through a tool loan or rental program at many parts stores.

In order for an engine to run it needs the following:

1. Fuel (Fuel pressure gauge)
2. Spark (In line Spark tester)
3. Injector pulse (Noid Lights)
4. Air/Compression

You must determine which one or more is missing to proceed.

You can reduce the troubleshooting by spraying carb clean or a little ether into the intake throttle body to see if it attempts to start.If it does, then there is a problem with fuel delivery and not ignition.This will tell you whether or not there is fuel being delivered and isolate the issue to fuel pressure/delivery or injector control circuits.

For your 1992 BUICK PARK AVENUE:

FUEL SYSTEM PRESSURE 41-47 PSI(POUNDS PER SQUARE INCH)

POSITION THE IGNITION SWITCH AND THE A/C SYSTEM IN THE
OFF POSITION.  INSTALL A FUEL PRESSURE GAUGE TO THE   
VEHICLES FUEL RAIL OR FUEL PRESSURE TEST PORT.        
CONFIRM THAT NO LEAKS ARE PRESENT, AND VISUALLY       
VERIFY THE PSI READING ON THE GAUGE WITH THE IGNITION 
IN THE ON POSITION

You can check for spark at a spark plug wire while cranking with a flat tip driver or in line spark tester inserted into the plug wire boot and placed close to any metal part on the engine besides the fuel system lines and fittings or just plugged back onto the spark plug if using an inline tester.

To check injector pulse you will need a noid light set which can be purchased at your local parts store or through tool rental or loan programs as mentioned above.(Picture below)

To check for air just make sure the air filter is not totally restricted.

To check compression install compression gauge in each cylinder,crank engine,record reading for each cylinder.Look for a big variance between cyls.

If all of this is OK you may have contaminated fuel.

Please post back with your results so that we may help you through you car trouble.

Noid Light should flash while cranking engine.

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Edited by railman on 5/29/2006 at 2:39 PM

Expert:	Michael
Pos. Feedback:	99.4 %
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Answered:	5/29/2006

Auto Service Technician

21yrs.Foreign and domestic driveability diagnosis and repair/ ASE Cert./Fuel Injection Specialist.