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 Matt Your Own Question
Matt, Engineer - BEng Hons
Category: Porsche
Satisfied Customers: 21618
Experience:  Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
Type Your Porsche Question Here...
Matt is online now
A new question is answered every 9 seconds

Porsche 964: , i got a project body car 964 targa 1991, and

Customer Question

hi, i got a project body car 964 targa 1991, and i had rebuilt the car completely the only thing now confusing me if the DME UNIT FAULTY OR THE CRANKSHAFT POSITION SENSOR is faulty , no spark , and no injector signal no spray , how i can check manually by ohm meter the signal of the CPS how much it suppose to send out ?
Submitted: 2 years ago.
Category: Porsche
Expert:  Matt replied 2 years ago.
the crank sensor should be a 2 wire device that will have a resistance across the pins of about 200-300 ohms
greater than this and it should be replaced
if this doens't help then check that you're getting 12V to the DME relay in the fusebox when the ignition is on
Expert:  Matt replied 2 years ago.
do you still need help?