How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask john -aka eauto Your Own Question
john -aka eauto
john -aka eauto, The Car Guy
Category: Saturn
Satisfied Customers: 16011
Experience:  ase tech 15 + years foreign domestic & european
Type Your Saturn Question Here...
john -aka eauto is online now
A new question is answered every 9 seconds

98 saturn sl1 is cranking but not catching. I can't seem to

Customer Question

98 saturn sl1 is cranking but not catching. I can't seem to get any spark. I replaced spark plugs, spark plug wires, coils and ICM, but still has the same problem.
Submitted: 11 months ago.
Category: Saturn
Expert:  john -aka eauto replied 11 months ago.

does it have a crank or cam signal? injector pulse?

Customer: replied 11 months ago.
I haven't tested these, is there an easy way to test?
Expert:  john -aka eauto replied 11 months ago.

We will have to pinpoint what the engine is missing.




All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the car to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should! Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition.

Customer: replied 11 months ago.
Is testing the fuel injectors something that is necessary when I already know that I am not getting any spark?
Expert:  john -aka eauto replied 11 months ago.

it helps narrow things down... do you have crank and cam signal?

Expert:  john -aka eauto replied 11 months ago.

have you solved your issue?