1998 GMC Savana Starting problem

Tiny
NIG1584
  • MEMBER
  • 1998 GMC SAVANA
  • 5.7L
  • V8
  • RWD
  • AUTOMATIC
  • 116,302 MILES
Hi was driving my gmc savana no problems stopped to get supply's went to start the van, it turns over but will not start.
Have changed the plugs, checked the distributor cap and rotor have got fuel in fuel lines but it try's to fire then just keeps turning over but will not run
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Saturday, March 15th, 2014 AT 6:53 AM

3 Replies

Tiny
WRENCHTECH
  • EXPERT
All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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Saturday, March 15th, 2014 AT 7:14 AM
Tiny
NIG1584
  • MEMBER
Have got a spark already checked this will check injectors and fuel pressure when I get the van back home waiting for it to be recovered at moment
Could you tell me what the fuel pressure should be
Ta
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Saturday, March 15th, 2014 AT 7:22 AM
Tiny
WRENCHTECH
  • EXPERT
60 to 66 PSI when the engine isn't running and this is very critical on the engine. You can have problems starting it if it even drops below 55PSI. Fuel pumps are a very common failure on these.
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Saturday, March 15th, 2014 AT 8:45 AM

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