Car was running last weekend, then monday it wouldn't. First thing I noticed was vacuum in the gas tank, I could hear it when the cap opens. I replaced the fuel filter, but no luck. I checked the relays they seem tobe ok also. I had and existing problem with the brains, I couldn't use the factory chips, the car would only start with the vortex 7% chips, the computor won't reset. I'm looking for suggestions on what to check next. I'd like to use my new g-tech and get some dyno results posted befor she's put away in 2 or 3 weeks.

 

does it crank and never catch? is there fuel? do the injectors click? do you have spark?

 

there cannot be vac in the gastank unless you have a problem with the emissions system ... when ppl remove the charcoal canister this happens.

 

Car not starting with certain chips is not a good sign .. installing the sc is a complicated procedure, if all is not well it is not well.

 

Car turns over, injectors clicking, removed plug but no spark. I have 300 miles on the sc now its been running great. I've had the car 5yrs now and never had this vac problem befor, and nothing has been removed. I don't know where the charcoal canister is, or how it relates to emissions.

 

Hey Jim,
It's 11:45 here in Atlanta. I'll give you a call in the AM. I know you'll be off tomorrow. Let's be sure to document it over on my site though so it we'll have the info there too.
BTW do you remember giving me some info recently on the cost of flywheel lock tools from various vendors? I need one for my 80 car?
Andy K

 

you can remove the canister without those problems. You just take the "IN" line and connect it to the "OUT" line. Your just loosing the "scrubbing" capability that the canister provides doing that...the rest of the "flow" in the system is unaffected,

I can only speak for the S4s but the charcoal canister line "out" eventually leads to the 3 way hose (via a electronic vlave) that connects to the oil filler neck and the throttle plenum area.
Correct me if im wrong.
I assume this is the same on the 85s in principle...the car sucks in its own gas fumes persay and the odor is eliminated by yet another step beyond that of the canister.
On my car with the current setup(twin screw), i cant really hook the line back up to the throttle plenum so the engine sucks it back in. The reason being my fear is that i would get so much vacuum under boost in the intake track that i would darn near suck every grain of charcoal from the canister and perhaps damage the gas tank i suppose! I dunno?
For now i just have it venting overboard. A few fill ups and nearly 1000 miles and no hint of fumes what so ever.
You will be wondering what to do with that line Heinrich, thats what i did.


HTH

 

I was looking at that system as well Tony. Seems that with a nice filter and keeping the one way gas valve in place, you can just take the entire system out of the car. All the lines, etc.

So the tank has the T off of the filler neck, and this goes into the expansion tank in the fender *remove that tank* and then it goes down into the one way valve and into the line to the charcoal *remove charcoal*.

If I recall, your intake is in that fender anyway - do you still have the charcoal canister? Seems like you could remove that as well?

 

IMHO, i wouldnt do that!
If your talking about removing the tank in the passenger rear fender(expansion tank) just look at its name! You fill your tank up..weather..conditions change..fuel expands...where does it go now???I assume that is the purpose of it?? Makings of a problem i think.
My system is stock , everything is intact, and functions as stock except the one line that is supposed to go back into the intake....mine is left to vent overbaord. Like i said, no smell so far. Ill check with a match at my next fill up

 

Andy, I read the other thread and didn't want to add any more fuel to the fire, but I also wouldn't want anyone to think your anything other than completely honest. The phone call was with Carl wayback in july. He did say, he doesn't stock the tool for sale but he would sell one for $100. 928intl sells them for $49. I've ordered from Carl in the past, and will continue to in the future if the price is right I'm there. 928intl service is unmatched, the fuel filter and temp sender I ordered late last monday, was delivered that wed. 3k miles in one day. I paid for ups 3day service, how do they do that?

 

Thanks Tony ... well, I may do the same because despite wanting very much to remove as much unneeded crap from the car, I also believe that little canister is functional. Unfortunately. So I'll likely leave it there.....

 

There is your problem ... no sparky .... we need sparky ....

So, brain, coil wires etc. Check for spark on the other coil side, ie other bank of plugs (remember they aren't left-right but L-R-L-R-L-R etc ... so ....

 

Jim,
I need your # or call me. 310 872 6207.
Andy

 

Your right Tony. I'll leave the expansion maybe but I've already removed everything else (well, even the tank, but I'll PUT BACK only some things...) you get me.

 

The container in the rear wheel well is a separator, it condenses fuel vapors and returns them to the tank. The input line (G), is too small to make it an expansion tank?


click pic for thread

The charcoal cannister doesn't do any cleaning. The charcoal's purpose is to store the vapors.