Gasoline smell at WOT - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 09-13-2016, 01:36 PM

Since swapping the ZZ502 for an LS3 I now get a periodic strong gas smell after getting on the throttle. Tank is in the rear (not the cab) and there are no leaks that I can locate.

I'm running all 4 eRod cats plus a factory transverse muffler, so I'd figure it would burn up any excess fuel, but I guess not.

Has anyone else noticed this? I think it almost has to be in the exhaust, but that's far behind me, dumping behind the rear bumper, and this is while underway of course.

Thoughts? It's not bothersome, really, but I worry about any gasoline fumes that I cannot explain.

BR3W CITY · 09-13-2016, 07:17 PM

Normally my thoughts would be running rich as hell, but you shouldn't be running that fat on an erod.

davepl · 09-14-2016, 01:14 PM

Unless the accelerator pump shot (or Delta vMAP or whatever) is too much, but you'd think, as you say, they have the eRod tune pretty close.

davepl · 09-14-2016, 01:51 PM

BTW I'm not running the MAF. It has never run properly with the MAF, almost like there is a vacuum leak or other unmetered air. But I've never been able to solve that, and it runs near perfect without the MAF, so that's how I run it.

09-13-2016, 01:36 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Gasoline smell at WOT Since swapping the ZZ502 for an LS3 I now get a periodic strong gas smell after getting on the throttle. Tank is in the rear (not the cab) and there are no leaks that I can locate. I'm running all 4 eRod cats plus a factory transverse muffler, so I'd figure it would burn up any excess fuel, but I guess not. Has anyone else noticed this? I think it almost has to be in the exhaust, but that's far behind me, dumping behind the rear bumper, and this is while underway of course. Thoughts? It's not bothersome, really, but I worry about any gasoline fumes that I cannot explain. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

09-13-2016, 07:17 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Gasoline smell at WOT Normally my thoughts would be running rich as hell, but you shouldn't be running that fat on an erod. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-14-2016, 01:14 PM	#3
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Gasoline smell at WOT Unless the accelerator pump shot (or Delta vMAP or whatever) is too much, but you'd think, as you say, they have the eRod tune pretty close. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

09-14-2016, 01:51 PM	#4
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Gasoline smell at WOT BTW I'm not running the MAF. It has never run properly with the MAF, almost like there is a vacuum leak or other unmetered air. But I've never been able to solve that, and it runs near perfect without the MAF, so that's how I run it. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

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