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Please Help - 89 Firebird will not start anymore.


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Glowsock
New User

Sep 4, 2014, 8:14 PM

Post #1 of 13 (1496 views)
  post locked   Please Help - 89 Firebird will not start anymore.  

Hello everyone. I'm new to the forum so hopefully this is the right place for this post. I have an 89 Firebird with a 305 (5.0L) fuel injected. Recently my Dad and I changed the fuel filter and Water pump. As well as got rid of a T placed in the bottom rad hose for the heater hose to attach to and returned the hoses to how they would be normally. After that it was running fine... Until today. When I was moving it in the yard It stalled on me. After that it would not idle, just kept stalling. The car sat for an hour or two and now it won't start at all unless we poor gas directly down the throttle body. The fuel pump seems to be working fine and when the engine side of the fuel filter was undone there seemed to be a steady stream of fuel. Also the injectors are spitting fuel while it turns over. But the car has a hard time starting and if it will start it dies almost right away.

Any help would be greatly appreciated.


(This post was edited by Glowsock on Sep 5, 2014, 11:55 AM)


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 4, 2014, 9:10 PM

Post #2 of 13 (1487 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

You should T in a fuel pressure gauge at the fuel filter and see what the fuel pressure is doing. Need to know what the fuel pressure is while your cranking the engine.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Sep 4, 2014, 9:11 PM)


kev2
Veteran
kev2 profile image

Sep 5, 2014, 11:31 AM

Post #3 of 13 (1464 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

this is a throttle body - 2 injectors visible in the throttle body AND they are spraying?
only spray when eng is cranking?

Colleague's suggestion of a fuel pressure test is a place to start-


Glowsock
New User

Sep 6, 2014, 10:43 PM

Post #4 of 13 (1445 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

Yes both pods are spraying fuel. If I pump the pedal I can keep the car going but as soon as I stop the car will die. I dont have a fuel pressure gage. We changed the fuel pods, put injector cleaner in the tank and replaced a damaged wire connected to the distributer. No luck there. I put a code reader on the car and it gave me the code. (Check engine light soon) Blink/ pause/ Blink/ Blink. Also known as code 12. But the book is confusing. It sais code 12 is a failure of signal from distributor to electronic control module. But it also sais something about code 12 meaning nothing


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 7, 2014, 5:05 AM

Post #5 of 13 (1436 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

You need to know that pumping the gas pedal on a fuel injected car does nothing but exercise your foot.

Have you tried keeping it running by spraying some carb cleaner into the intake?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 7, 2014, 6:40 AM

Post #6 of 13 (1431 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

Need to know what the fuel pressure is. It might have just enough pressure to make it somewhat idle, but fall flat on its face when it needs more fuel volume.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Sep 7, 2014, 8:20 AM

Post #7 of 13 (1424 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

Correct me if wrong please but code 12 means you have communicated with the computer - that's all and dunno how your methods work but repeats and if not on to another that ends that for diagnostics on that type. Move on to real testing,


T



kev2
Veteran
kev2 profile image

Sep 7, 2014, 8:53 AM

Post #8 of 13 (1419 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

code 12 - is all you get then the report is complete.
As it can run - poorly- confirms that code 12 is just proof of communication- all academic right now.


The throttle use to maintain engine running- I would look at -
1)You say both "pods" are spraying, when engine off key in run? or only spray when engine is running?

2)Your description has me thinking VACUUM leak - check the TBI base gasket and the EGR - be sure pintel is seated.


Glowsock
New User

Sep 7, 2014, 9:45 AM

Post #9 of 13 (1413 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

Thank you for all for replying. I'm aware that pushing the pedal on fuel injection just opens the butterfly. But it seems to keep the car from dying if I pump it the right way. It doesn't run smoothly and constantly wants to stall but I can keep it running for a few minutes like that. I havnt tried break cleaner but poring a bit of gas down the throttle body kept it running fine until that gas burnt up. If it was a vacuum leak wouldn't that have no difference? I'm not 100% sure but I believe the pods only spray when engine is on and cranking


(This post was edited by Glowsock on Sep 7, 2014, 9:54 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 7, 2014, 9:57 AM

Post #10 of 13 (1409 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

OK, the gas test pretty much confirms you have a fuel supply problem. It can be plugged up injectors but it's much more likely a fuel pressure issue. You need to get an accurate reading on fuel pressure before going any further.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



kev2
Veteran
kev2 profile image

Sep 7, 2014, 10:01 AM

Post #11 of 13 (1408 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

those POD's are the injectors... It is important to check that the spray as I asked- 2 people - you observe the injectors - other person moves key to RUN not start- are (injectors) leaking?

Again check for VACUUM leak - Ck that EGR - vacuum lines -
I will reread all the posts - were there any reoairs work prior to this issue?


Glowsock
New User

Sep 7, 2014, 6:02 PM

Post #12 of 13 (1402 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

Thanks everyone. We solved the problem. We were going to drop the tank but found out there was a hole under the carpet behind the rear seats that the previous owners cut to change the fuel pump. Discovered that whoever replaced the fuel used a zap strap to hold the line on the pump and the pump slipped off the line. We put it back on and secured it with a hose clamp and it's working great now


Tom Greenleaf
Ultimate Carjunky / Moderator
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Sep 8, 2014, 8:14 AM

Post #13 of 13 (1391 views)
  post locked   Re: Please Help - 89 Firebird will not start anymore.  

! OK - Seem you have found it and fixed it. That wouldn't be on a normal suspect list but should have showed up with testing that fuel issues were the problem then go find out why. I'll close out as solved. YOU can re-open upon request from any moderator,


T







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