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 rpmdiag Your Own Question
rpmdiag
rpmdiag, Tech and Instructor
Category: Car
Satisfied Customers: 6859
Experience:  Since 1975
12769047
Type Your Car Question Here...
rpmdiag is online now
A new question is answered every 9 seconds

Discovery, 3.9 V8i petrol, 1997 pre catalyst with cats

Customer Question

Discovery, 3.9 V8i petrol, 1997 pre catalyst with cats fitted post manufacture. Engine misfires. All ignition components and leads tested/replaced, different second hand distributor and ecu fitted, timing set to 6°BTDC, engine advances smoothly with increased revs.Have I missed anything? Any suggestions?
Submitted: 2 months ago.
Category: Car
Expert:  rpmdiag replied 2 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 2 months ago.

Engine compression needs to be tested.

Injectors need to be tested for operation and if they're getting power.

Thanks, Ron

Expert:  rpmdiag replied 2 months ago.

If you're satisfied with my answer, then please remember to rate me 5 stars and keep this link in case you need me again later on.

Ron

Expert:  rpmdiag replied 2 months ago.

Hi, I'm just following up with you to see if you have any more questions.
Thanks, Ron

Related Car Questions