MadeInJapan Posted January 15, 2006 Report Share Posted January 15, 2006 Hadn't noticed it until tonight because I've been parking outside with guests at our house parking in the garage. I opened the hood after a fairly spirited run and noticed a strong gas odor under the hood. Recently the PCV system was replaced as well as the MAF. All runs well, getting great gas mileage too and not burning any oil. Someone, please tell me if this is normal and if not what I should be looking for. My car's a '98 S70 T5. Link to comment Share on other sites More sharing options...
James100 Posted January 15, 2006 Report Share Posted January 15, 2006 "Raw" gas smell is not normal. Meaning some type of gas leak to look for. Are you sure its under the hood and not from over flow from a recent fillup? On my 850 when I get a fillup and I bring it back to my garage there is an odor because there is some vent on top of my gas tank that has a very slight leak. Once I drive for a while the odor is gone. I also cant smell it in the cabin only in the confined area of the garage. Since you just did the PCV I would turn it on and look for the leak around the injector area if you had to move them on your car. And be careful we dont want your car to burn up. :o Link to comment Share on other sites More sharing options...
PorBleemo Posted January 15, 2006 Report Share Posted January 15, 2006 Do you get the smell in the cabin during the run? Link to comment Share on other sites More sharing options...
MadeInJapan Posted January 15, 2006 Author Report Share Posted January 15, 2006 Do you get the smell in the cabin during the run?No smell in the cabin at all...also it was several days ago that I filled up with gas. The smell is only when I lift the hood. It's quite strong. At first I thought it was an oil burning kind of smell, but now I'm pretty sure it's gas. I had a leak under the plug cover (the plastic one) a couple of weeks ago and ran the car without it for a few days after tightening the PCV oil trap to top of engine line and there were no more leaks so I put the cover back on. I'll look under that tomorrow to see if I have a leak again. If I do, then I'll know it's the oil fill cap and I'll get a new one (I know it's not the gasket- it's been changed a couple of months ago). So, I need to determine if there's a gas smell in my oil too then. But...I sort of doubt all of this. I wouldn't be surprised if it's a very small leak of the fuel return line or fuel regulator line under the fuel rail. Just hate to get into all of that again as it was just taken off in Dec. Would rather have someone else trouble shoot it at this point....hmmm.Update: After I posted the above, I went out to my car with a flash light and lifted the hood. All the gas smell is gone. Since I drove it just 2 hours ago the engine is still a bit warm and so I was able to put my nose down close to things and smell different areas. The smell is not from the turbo area or even near the spark plug cover. What I did smell was a faint gas smell right down on the fuel rail, on top of both #1, and #2 fuel injector (from the left) as well as the silver, bulbous, cylinder looking thing between them. The ends of the fuel lines did not smell at all. So, what does this suggest? Does it mean I probably need new injector O-rings? Please let me know what you think. Link to comment Share on other sites More sharing options...
James100 Posted January 15, 2006 Report Share Posted January 15, 2006 MadeInJapan-Where did you get the MAF and how much $ was it? Link to comment Share on other sites More sharing options...
James100 Posted January 15, 2006 Report Share Posted January 15, 2006 You also might try to look for the leak at night in the garage. Use a real strong light and shine it at the area you suspect, you might catch the leak from reflection. Also you might want to check when the engine is cold. If you check the engine when it is hot if its a slight leak the heat will probably make it evaporate. Link to comment Share on other sites More sharing options...
MadeInJapan Posted January 15, 2006 Author Report Share Posted January 15, 2006 MadeInJapan-Where did you get the MAF and how much $ was it?I was in a hurry...needed the car that day so I went to the dealer However, the parts manager made a deal with me...$177 instead of their stated price of $208. I learned of a used MAF at a used car place too for $60 near by, but didn't do it because we were not sure it would actually fit my S70...was off of an 850. Later found out the part number was the same. The new MAF solved all my idling problems.You also might try to look for the leak at night in the garage. Use a real strong light and shine it at the area you suspect, you might catch the leak from reflection.Right...my above post indicates I did the "in the dark" test with flashlight. However, I saw no reflection of gas...what I did get was slight "whiffs" of it in certain places, especially right above 2 injectors and one bulbous looking round thing between the two, under the fuel rail. So, what does this mean? Link to comment Share on other sites More sharing options...
James100 Posted January 15, 2006 Report Share Posted January 15, 2006 I would also be using a torque wrench to tighten any bolts associated with that repair. Have you been using a torque wrench? Link to comment Share on other sites More sharing options...
Stamperman Posted January 15, 2006 Report Share Posted January 15, 2006 Hadn't noticed it until tonight because I've been parking outside with guests at our house parking in the garage. I opened the hood after a fairly spirited run and noticed a strong gas odor under the hood. Recently the PCV system was replaced as well as the MAF. All runs well, getting great gas mileage too and not burning any oil. Someone, please tell me if this is normal and if not what I should be looking for. My car's a '98 S70 T5.I had a similar problem on my 94 850 turbo. I don't know if it will apply to your V70. The rubber return line of from fuel pressure regulator had rotted and was dribbling gas down the front of the motor. It's in the vicinity of the area you are smelling gas. Link to comment Share on other sites More sharing options...
rp850 Posted January 15, 2006 Report Share Posted January 15, 2006 For safety's sake, inspect both fuel lines where they enter the fuel rail. The rubber hose is known to dry up and get brittle so it's time to replace that if that's the case. If the PCV was done recently, new injector seals (top and bottom) would have good to replace at that time. At a minimum, petroleum jelly should have been used to lube the o-rings when the fuel rail was put back on. You might also check the connections where the fuel lines bolt to the back of the motor.Also, the new Volvo OEM oil filler cap has worked like a charm for me. No more oil leaking out. Good luck and hope this helps.No smell in the cabin at all...also it was several days ago that I filled up with gas. The smell is only when I lift the hood. It's quite strong. At first I thought it was an oil burning kind of smell, but now I'm pretty sure it's gas. I had a leak under the plug cover (the plastic one) a couple of weeks ago and ran the car without it for a few days after tightening the PCV oil trap to top of engine line and there were no more leaks so I put the cover back on. I'll look under that tomorrow to see if I have a leak again. If I do, then I'll know it's the oil fill cap and I'll get a new one (I know it's not the gasket- it's been changed a couple of months ago). So, I need to determine if there's a gas smell in my oil too then. But...I sort of doubt all of this. I wouldn't be surprised if it's a very small leak of the fuel return line or fuel regulator line under the fuel rail. Just hate to get into all of that again as it was just taken off in Dec. Would rather have someone else trouble shoot it at this point....hmmm.Update: After I posted the above, I went out to my car with a flash light and lifted the hood. All the gas smell is gone. Since I drove it just 2 hours ago the engine is still a bit warm and so I was able to put my nose down close to things and smell different areas. The smell is not from the turbo area or even near the spark plug cover. What I did smell was a faint gas smell right down on the fuel rail, on top of both #1, and #2 fuel injector (from the left) as well as the silver, bulbous, cylinder looking thing between them. The ends of the fuel lines did not smell at all. So, what does this suggest? Does it mean I probably need new injector O-rings? Please let me know what you think. Link to comment Share on other sites More sharing options...
MadeInJapan Posted January 15, 2006 Author Report Share Posted January 15, 2006 I had a similar problem on my 94 850 turbo. I don't know if it will apply to your V70. The rubber return line of from fuel pressure regulator had rotted and was dribbling gas down the front of the motor. It's in the vicinity of the area you are smelling gas.With hood up and standing in front of the car, that's on the right side of the fuel rail right? The smell I have is coming from the left side...the two injectors that are to the far left...#1 and #2? Anyway, thanks, but don't think that's it. by the way, what's the metal mushroom shaped thing between the 2 injectors in that area? That may be the cause of the smell and not the injectors...hard to really pin-point it down. Link to comment Share on other sites More sharing options...
ericutexas Posted January 15, 2006 Report Share Posted January 15, 2006 I had a similar problem as you, with a raw gas smell under the hood right after I did the oil trap job. What happened with me is when I reinstalled the fuel rail, I damaged part of the upper o-ring (at the end that goes into the fuel rail) for one of the injectors, and I saw fuel running over the intake manifold after a hard run. Try removing the fuel rail again and removing each injector to check to see that the o-rings aren't damaged - and you might not be able to pinpoint the exact leak because the o-ring isn't visible when everything is screwed together. I did this - replaced the damaged o-ring, torqued the fuel rail on to spec ... no more leaks! Link to comment Share on other sites More sharing options...
MadeInJapan Posted January 15, 2006 Author Report Share Posted January 15, 2006 Okay...that's what I'm thinking it is now...I see no visible fuel anywhere...might need to get a small mirror under the fuel rail and check the upper ones. Thanks again! Link to comment Share on other sites More sharing options...
James100 Posted January 15, 2006 Report Share Posted January 15, 2006 Okay...that's what I'm thinking it is now...I see no visible fuel anywhere...might need to get a small mirror under the fuel rail and check the upper ones. Thanks again!Maybe someday they will have dogs that can sniff for gas leaks. :lol: Link to comment Share on other sites More sharing options...
ericutexas Posted January 15, 2006 Report Share Posted January 15, 2006 Oh ... and I might add that in my case, the whole underside of the fuel rail was wet, probably due to the fuel running from one side to the other during turns - but if you actually look at the plastic body of the injectors, the one that was leaking in my case was wet, while the other ones were dry. Link to comment Share on other sites More sharing options...
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