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 JFN1 Your Own Question
JFN1
JFN1, ASE Certified Technician
Category: GMC
Satisfied Customers: 4413
Experience:  GM Master Technician
25345654
Type Your GMC Question Here...
JFN1 is online now
A new question is answered every 9 seconds

Just replaced the motor now it idles rough going from 600 to

Customer Question

Just replaced the motor now it idles rough going from 600 to 900, if I unhook the vacuum line from brake booster it idles at an even 1500. Think I need to check for leak in vacuum line. Do you have a vacuum line diagram for 95 s10 vortec v6 cpi?
JA: Leaks can get messy. The GMC Mechanic will know what to do. Are you hoping to fix this yourself?
Customer: Yes as I replaced the motor by myself
JA: Great! What have you tried so far?
Customer: Cleaned egr valve and input, replaced idle air control valve
JA: Is there anything else the GMC Mechanic should be aware of about your GMC?
Customer: It's 95.5 vortec v6 code W cpi injection
JA: Our top GMC Mechanic is ready to take your case. Just pay the $5 fully refundable deposit and I'll fill the GMC Mechanic in on everything we've discussed. You can go back and forth with the GMC Mechanic until you're 100% satisfied. We guarantee it.
Submitted: 9 months ago.
Category: GMC
Expert:  JFN1 replied 9 months ago.

Is the check engine light on when this is happening?

Customer: replied 9 months ago.
Expert:  JFN1 replied 9 months ago.

What trouble codes are you logging as this is going on?

Customer: replied 9 months ago.
Code reader keeps saying connection error tried it about 15 different times checked connection and wires all are fine
Customer: replied 9 months ago.
OK used a different code reader got code p1345
Expert:  JFN1 replied 9 months ago.

I'm sorry for the delay, I was supposed to get an email notification that you had responded, but I didn't get that notification.

P1345 means you need to perform the crankshaft variation learn procedure, but this won't cause an idle issue, or any other issue, for that matter.

What is the fuel trim doing when it's idling high like this?

Customer: replied 9 months ago.
Already solved the issue
Expert:  JFN1 replied 9 months ago.

What did you find, out of curiosity?

Customer: replied 9 months ago.
Distributor needed readjusted
Expert:  JFN1 replied 9 months ago.

Very good.

Expert:  JFN1 replied 8 months ago.

Did you get this worked out? Wanted to follow up and make sure you got what you needed from me.

Please remember to rate my answers, that's how I get compensated.

Related GMC Questions