Re: Air/Fuel Mixture Unit Problem?...Cold Engine Coughing (OhMyGli)
might be a vaccum leak or timing
might be a vaccum leak or timing
Air/Fuel Mixture Unit Problem?...Cold Engine Coughing
Hey guys, this topic received no attention over in Technical/ 8 v....maybe you all can help.
Ok here's the deal...
My 84 GLi turns over easy and idles fine at 1000 rpms. But when I hit the gas the rpms drop and the engine "coughs" a bit. I opened the hood and modulated the throttle on the throttle body to hear where most of the noise was coming from. It sounds as though there's some "popping" in the air intake boot.
Maybe a problem with the air fuel mixture unit? It kinda sounds like it's maybe trying to get more air but can't?
After the car warms up, the problem goes away. We thought it might be clogged fuel injectors, so we added a bottle of Chevron Techron and a fresh tank of 93. I've only driven about 30 miles since then, so they might still be clogged? Oh yeah and it's already got a new fuel filter.
Please keep in mind that I'm still learning, so if any of this sounds silly, I apologize.
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Thanks for the help...again,
Erin
Ok here's the deal...
My 84 GLi turns over easy and idles fine at 1000 rpms. But when I hit the gas the rpms drop and the engine "coughs" a bit. I opened the hood and modulated the throttle on the throttle body to hear where most of the noise was coming from. It sounds as though there's some "popping" in the air intake boot.
Maybe a problem with the air fuel mixture unit? It kinda sounds like it's maybe trying to get more air but can't?
After the car warms up, the problem goes away. We thought it might be clogged fuel injectors, so we added a bottle of Chevron Techron and a fresh tank of 93. I've only driven about 30 miles since then, so they might still be clogged? Oh yeah and it's already got a new fuel filter.
Please keep in mind that I'm still learning, so if any of this sounds silly, I apologize.
Thanks for the help...again,
Erin
1 - 9 of 9 Posts
Re: Air/Fuel Mixture Unit Problem?...Cold Engine Coughing (WackyWabbitRacer)
Ok, just a few more Q's.....
Will I do any other damage to the car if I drive it in its current state before I get a chance to fix it. It runs like a charm once its warm, so if I let it warm up first, will be it be ok? I might need to run it like this for a week or two.
Also, anything to look out for when doing the install on the CPR? I should be able to get one pretty easily (access to parts car). I can follow the Bentley no prob, but just wanted to know if there is anything quirky about the install.
Thanks again
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Erin
Ok, just a few more Q's.....
Will I do any other damage to the car if I drive it in its current state before I get a chance to fix it. It runs like a charm once its warm, so if I let it warm up first, will be it be ok? I might need to run it like this for a week or two.
Also, anything to look out for when doing the install on the CPR? I should be able to get one pretty easily (access to parts car). I can follow the Bentley no prob, but just wanted to know if there is anything quirky about the install.
Thanks again
Erin
Re: Air/Fuel Mixture Unit Problem?...Cold Engine Coughing (OhMyGli)
PROBLEM SOLVED.
Turns out it was just the Jetronic relay. I ended up having to go to a mechanic though....couldn't check the CIS pressure on my own. Let me just say this - WackyWabbitRacer is a wise wise man. My friend and I spent an afternoon swapping the CPR and it wasn't even necessary. I've sure learned my lesson - diagnostics first, part replacement second.
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At least now it runs like a dream and I'm loving every single minute of it.
![]()
Thanks for all the advice.
Erin
PROBLEM SOLVED.
Turns out it was just the Jetronic relay. I ended up having to go to a mechanic though....couldn't check the CIS pressure on my own. Let me just say this - WackyWabbitRacer is a wise wise man. My friend and I spent an afternoon swapping the CPR and it wasn't even necessary. I've sure learned my lesson - diagnostics first, part replacement second.
At least now it runs like a dream and I'm loving every single minute of it.
Thanks for all the advice.
Erin
2
1 - 9 of 9 Posts
