My 1997 Transport is misfiring.

Tiny
BRIANGSANOVAL
  • 1997 PONTIAC TRANSPORT
  • 137,000 MILES

I did a head gasket job on a 1997 Pontiac transport 3.4L engine and once I put everything back together the car starts but it's misfiring/putting. One thing I notice is that one of the rockers arms is loose and is not making good contact with the top of the valve. My question is can that cause a misfire or any rough idling. I also have the check engine light on and it was blinking probably because of the misfire. Any suggestions on what to look for or what to do. Also does anybody have a picture of all vacuum/ emission hoses and the way they go there is one broken but I have no idea where it goes. Thanks a lot

Do you
have the same problem?
Yes
No
Monday, June 25th, 2012 AT 3:24 AM

5 Replies

Tiny
RASMATAZ
  • MEMBER

Fix the loose rocker arms problem-yes it can create a misfire and also have the computer scanned for code/s

Was this
answer
helpful?
Yes
No
Monday, June 25th, 2012 AT 10:28 AM
Tiny
BRIANGSANOVAL
  • MEMBER

I just bought an OBD2 scanner and it's telling me I have two codes PO102 Mass air flow sensor circuit, low input and a PO300 random/multiple cylinder misfire detected. What do I check for or what can I do about this.

Was this
answer
helpful?
Yes
No
Monday, June 25th, 2012 AT 9:16 PM
Tiny
RASMATAZ
  • MEMBER

Did you fix the rocker arm problem?

Was this
answer
helpful?
Yes
No
Monday, June 25th, 2012 AT 11:38 PM
Tiny
BRIANGSANOVAL
  • MEMBER

Not yet I will be doing it soon.

Was this
answer
helpful?
Yes
No
Tuesday, June 26th, 2012 AT 2:56 AM
Tiny
RASMATAZ
  • MEMBER

Let me know when your done-You need to do what we tell you to do-this one is not an easy fix for us to help here, you have to do your part if you want it fix

Was this
answer
helpful?
Yes
No
Tuesday, June 26th, 2012 AT 7:47 AM

Please login or register to post a reply.

Other Misfire Idle Questions