i got a TN kit and an Alternate atmosphere fuel return system. the problem is when i turn the ac on and the air is set to come in from the outside it smells like gas strongly, is this a common problem ? i didnt see a leak anywhere but at the same time i didnt inspect every line, any suggestions?

 

If you're smelling gas, then you prolly have a leak. You should be able to pressure test it rather easily. IF you can't hear anything, soap the lines.

 

Def. check for fuel leak under the hood. The AC when on outside air pulls 'fresh' air from the engine bay. From what I heard (and experience) the newer AAM systems don't have this problem only the older ones, and its not inside the car its outside after sitting a long time.

I have an AAM system and had the smell for the first month or so but it went away completely. I have a feeling it was residual fuel smell from the installation in the engine bay.

 

Delete my post after read djamps post.

 

Injector O ring probably not properly inserted into fuel rail or it's torn... With engine idling, raise hood and stick your nose near the plenum. If you smell fuel, it's the injectors leaking. Use a flashlight and see if you can see fuel pooled around one of the injectors.

 

It might just be fuel vapors. THe AAM are known to have that problem especially when u have a full tank of gas.

 

if the charcoal canister was removed you will have a fuel smell after the car sits.

 

Just trace the lines from pump to injectors to find leak. Simple.

 

The newer systems have different lines - no vapor issue.


OP, what system do you have? If you have purchased the system from us within the last year and a half, it should be one of the newer systems. That was one of the first things I did when I got back with AAM - switch the lines over to coated teflon lines.

If its a basic system and you have no rails, then most likely you have a small leak around the regulator or the small line coming off of the is not properly connected. If everything is installed correctly, there is not much of a line, even on the older kits, to emit vapor.

Also, to eliminate any chance of small leaks, use yellow fuel resistant teflon tape on the AN fittings. And check the allen key bolt (or fuel pressure gauge) on the front of the regulator. Its unlikely, but on one occasion, I saw it back out out over time on the Aeromotive regulator.

PM me if you have any other questions. I'll be glad to help.

-Clint

 

thanks for ur help guys, gettin under the hood as soon as i geta chance and reportin on the findings

 

ya def check that front 1/8th NPT sender hole. Mine was leaking from there.