Welcome to the all new Geo Metro Forum. We hope you enjoy your visit.You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are features you can't use and images you can't see. Registration is simple, fast, and completely free. If you're already a member please log in to your account to access all of our features: Join our community! |
| Geo 1.0 backfires through throttle body | |
|---|---|
| Tweet Topic Started: Jul 20 2014, 01:19 PM (404 Views) | |
| 96Geoman | Jul 20 2014, 01:19 PM Post #1 |
![]()
|
I need to fix my engine so it will pass emissions. It has been giving multiple codes of misfire on #1 cylinder Throttle body is black from backfiring. I am thinking about having the head rebuilt because I have read on some threads that it's probably a burnt valve. Engine is a 1.0 that I purchased used as a Japanese import back in 2008. It has high miles Thanks |
![]() |
|
| freegeo | Jul 20 2014, 01:38 PM Post #2 |
![]()
|
Sounds like you may have a sticking valve. Have you done a compression test on the engine. Check the plug and wires and cap on it to make sure they are in good shape. A miss fire should not cause a backfire unless your valve is stuck open or timing is way off. Check to make sure your timing belt hasn't slipped a tooth. |
![]() |
|
| cwatkin | Jul 20 2014, 07:00 PM Post #3 |
![]()
|
Good suggestions. Do a compression check first, then check timing. Intake valves don't usually burn but it isn't impossible. If one cylinder is way lower in compression than the others, you probably found the problem. Conor |
![]() |
|
| 96Geoman | Jul 23 2014, 05:56 PM Post #4 |
![]()
|
Thanks, Timing was way off, only around 1 to 2 degrees. I am still getting a misfire on the same cylinder although the engine seems to not be backfiring. Engine does idle kind of rough |
![]() |
|
| 96Geoman | Aug 9 2014, 10:05 AM Post #5 |
![]()
|
Thanks for the timing suggestions! After adjusting the timing, I was able to pass emissions! This forum is awesome!!! |
![]() |
|
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
| « Previous Topic · Engine Tech & Diagnostics · Next Topic » |


Welcome to the all new Geo Metro Forum. We hope you enjoy your visit.





3:50 AM Jul 11