Yummybud924

First of all I don't really smell fumes but i"m pretty sure fumes are getting in as I get really bad headaches , which I first didn't realize that they occured right after driving somwhere.

I had a 78 924 before i bought my current 944 and I had this same problem and that was actually the reason for selling that car. With the 924 I tried everything and nothing fixed the fumes, I bought a new hatch seal/ tried using foam tape to created a tighter seal plugged the holes in the luggage compartement checked the exhaust and non fixed the problem.

Now my 944 seems to have the same problem. The exhaust doesn't look like it is leaking, it's very quiet and I looked under it and it is not rusty and I don't see smoke coming out anywhere.

Also I did reseal the tailight as before water would get in and now it is water tight so they don't leak.

the hatch seal is new however it was cut but I used some silicone to fill up the small gap.

Now they thing that I don't know is if the seal actually forms a gas tight seal all around, it's possilbe that the hatch needs replacement, the frame is separating from the glass at the top.

I"m thinking of getting some duct tape tomorrow and taping all around the inside seal (seal to the hatch taped from the inside).

When I have the time I'll take it to the porsche shop that tensioned my timing belt to have them check it out. My hatch may need to be replaced or possibly resealed and adjusted.

I've had a big headache all day today after driving to school (only 15 minute drive), I'm pretty sure it's because of fumes in the cabin. On my old 924 I actually put a carbon monoxide detector in the car when driving and it would read CO levels.

Yummybud924

I also did a search and it seems like this fume problem is a big problem for a lot of people with 944s, probably because of the rear hatch desing and most rear hatches are probably seperating or not sealing properly.

resealing and adjusting the rear hatch or replacing it will most likely be really expensive but I will have to get it done probably by the porsche shop because they know the 944s.

I'd hate to get rid of my 944 because of this stupid problem.

Yummybud924

I'm thinking of buying this extra seal that you are suppose to put on the metal rail of the hatch, 920x auto parts on ebay sells it and caims it will make a tighter fit to eliminate exhuast fumes.... not sure how well that will attach to the metal railing or if it will actually make a better seal.

http://cgi.ebay.ca/Porsche-944-968-R...QQcmdZViewItem

UncleMaz

The hatch is probably part of the problem. The other problem, at least with mine, is the fuel hose rotted from the filler hole to the tank. You could also check the seal on fuel sender hole under the rear deck carpet. If it is the filler tube, you should have less fumes if you keep the tank below half way. If you replace it, you will have to drop the tank which is a big PITA. Good luck.

Yummybud924

I don't think it is gasoline because I think I would smell that. I just get headaches when driving so I suspect the hatch is not sealed airtight.

I'm thinking of putting some kind of seal like from that ebay seller to put around the frame on the hatch itself so it makes a better contact with the hatch seal on the body. Or I could just get some foam tape seal and put that around the hatch itself , that might work also and it's cheap to try.

my heat also never shuts off (when turned to zero, I can still feel heat from the vents) so I thought this might also have something to do with it? probably not, most people say that it is a hatch problem.

my hatch is definately separating from the glass at the top so I'm not sure if that would contribute to the problem as well. I have a feeling it will be really hard to find someone to reseal the hatch for me.

PCA 944

Same situation here.

Both my 78 924 (gas fumes) and the 86 944 (exhaust fumes) have odors. Let me know if you find a solution.

Yummybud924

I'm guessing the solution is not exactly the same for everyone. But from what I've heard I'm focusing on the rear hatch. I alreayd know that it is separating and there could be a chance that leaks air so the fumes get sucked in.

with my other car I tried taping over the small drain holes in the trunk area also but it didn't change anything.

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tkacki

The problem could be rubber boot mounted under the leather shift lever boot. Check it and the big foam seal as wel.

dme

shorten the pins and make a firmer fit when you close the hatch. That would be the first step. Doesn't cost a cent and takes 10 minutes.

harrisonrick

You could also have an exhaust leak around the firewall or just under the shifter area. The rubber boot around the shifter is a common leak zone too as mentioned.

EMBPilot

i heard replacing the charcoal canister can help sometimes too...? (im the last guy that should be giving advice)

seattle951

My 951 is currently at the glass shop getting a complete rebuild on the rear hatch. After the parts and labor, the total cost will be about $700. I am troubleshooting the same exhaust smell and could see daylight between the frame and glass and around all the seals.

Tom R.

take the seats out and shampoo the carpet. maybe there is a mold or mildew problem you are not sensitive enough to smell.....but...

my NA had a puddle on the floor by the rear seat. didnt know and it sat closed for two weeks. now i park it at night with the windows open, sprayed lyson, spraying febreeze. i still get a wiff when i first open the door. my next step is my bissel steam shampooer with the seats out.

alordofchaos

I hope it's not carbon monoxide in the passenger compartment... that's some serious stuff there. There are tests for that, something to do with measuring the oxygen levels in the blood.

harrisonrick

Come to think of it I think a headache is one of the symptoms related to CO2 poisoning.