Gas smell in cabin
Getting a fuel odor in cabin of Suburban, at times worst than others, see no visible fuel leaks at tank or under hood as well as no fuel smell. Just wondering if anyone else has encountered this issue.
Thank you in advance for any info.
We see a lot of these trucks and burbans with rusted out fuel sending units sometimes with no visible fuel leak until the tank is dropped.
There is a bulletin. 14858. Possible leaking high pressure fuel pump under intake manifold.
Thanks for the reply Craig, I'll take a look in the am, but when I pop hood there is literally no smell of fuel.
I have read that before-loose plugs, as a possible source of unexplained fuel odor, but if the plug was that loose to allow hydracarbons to escape on the compression stroke, wouldn't a misfire have been detected?
...I agree with Jim...check for loose spark plug(s)...Dan H. ...South Texas...
I have seen the leaking high pressure fuel pumps cause this smell as Gerald mentioned. I think they do not leak all the time, kind of like water pump seals. Try running it and shutting it off a few times. The few I have seen also had high fuel trims. The fuel leaks into the engine and raises the trims.
Run hvac on recirculate and see if smell goes away
Need to check fuel sending unit in tank for being rotted out on top. Also check the high pressure pump an direct injector seals for leaks under the intake.
We also have had a couple of Silverado's with leaking high pressure pumps and sensors. Customer complaint of gas smell in the cabin, not very noticeable in the engine bay until we got things nice and hot. There is some foam under the intake that holds the vapors and fluid in.
Just wanted to post the fix, Thanks to all who responded, the give and take on this forum has been impressive....someone had installed NGK plugs and also left 3 of the 8 hand tight, so which one was it? idk but thanks to the info from you guys it sent me in the right direction.
...Glad ya got it whipped into shape...I would recommend the proper plugs (as those are "probably" not them)...Dan H. ...South Texas...
You got that right Daniel! I should've mentioned that I did replace the NGKs with AC Delcos, all is good now.
...Iridiums right?...Dan H. ...South Texas...