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lexpert
lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 2100
Experience:  Master Certified with lexus, 8 years experience with Lexus
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Getting fuel but no spark, No not really, 1992 sc400, well,

Customer Question

getting fuel but no spark
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: No not really
JA: What is the model/year of your Lexus?
Customer: 1992 sc400
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: well, not much I was thinking it might be the timing belt?
JA: Anything else you want the mechanic to know before I connect you?
Customer: hmm....no just want to get it started. its been 2 weeks at a gas station in san francisco
Submitted: 2 months ago.
Category: Lexus
Expert:  Gunvir Singh replied 2 months ago.

Hello, let me review your request. Please stand by.

Expert:  Gunvir Singh replied 2 months ago.

Did you check for fuel injector pulse ?

Customer: replied 2 months ago.
No, i have not. I pulled fuel line and turned ignition
Expert:  Gunvir Singh replied 2 months ago.

Need to make sure if you have furl injector pulse. If you hava no spark but fuel pulse present the issue could be with the igniter system. If you are missing both spark and fuel pulse the problem could be with the timing or crank sensor.

Customer: replied 2 months ago.
Could it of jumped time? Onboard computer issue?
Fuses seem allright?
Timing belt?It just quit running at 15 mph
Expert:  Gunvir Singh replied 2 months ago.

It could be a timing or an electrical issue. To determine that need to check is spark and fuel pulse are present or if both are not present.

Customer: replied 2 months ago.
How do you check fuel pulse
Expert:  Gunvir Singh replied 2 months ago.

Proper way is with a noid light which is available from part stores or with a test light, see if signal present when you try to start.

Customer: replied 2 months ago.
Where do you place the light to check pulse?
Expert:  Gunvir Singh replied 2 months ago.

At the fuel injector connector.

Customer: replied 2 months ago.
How can u tell if distributors are moving.
Expert:  Gunvir Singh replied 2 months ago.

By removing the cap and turning over the engine.