Engine turns over wont start

KCOSPARKY26

MEMBER
1989 SAAB 900
200,000 MILES

After checking fuel pump and spark I plugged in a noid light and got nothing. What could be causing this?

thanks

I have fuel pressure and spark. But I have nothing when I plugged in the noiod light.

Monday, May 7th, 2012 AT 6:37 PM

7 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Possible the injector ground driver circuit within the computer is defective, injector fuse or injector wiring

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Monday, May 7th, 2012 AT 6:46 PM

DOCFIXIT

MECHANIC
18,828 POSTS

Checked for codes? 16V turbo or non? Sedan or convertible/
?

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Monday, May 7th, 2012 AT 6:50 PM

KCOSPARKY26

MEMBER
4 POSTS

It is a sedan. Tried to get a rent a tester to check for code, but none of the auto part stores have one. My son drove to work one day, and when he ot off it just turned over and wouldn't start. I rules out the fuel pump and had spark. Noid light test failed. I might have to tow it to a saab shop to have them test for codes.

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Monday, May 7th, 2012 AT 7:02 PM

KCOSPARKY26

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4 POSTS

It is a 16v turbo.

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Monday, May 7th, 2012 AT 7:32 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Use a test light to check for 12 volts at the injector. If there is, then they are not being grounded by the ecm. If there is not, you need to check the fuses.

What is the fuel pressure? How did you determine the pump is good?

You also need to check the crank sensor as its main function is to toggle the injectors.

Roy