Rotton egg smell only when backing up.
#1
Senior Member
Certified GM nut
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Rotton egg smell only when backing up.
Yesterday I backed into the driveway and noticed a strong rotton egg smell when I backed up. Noticed this before too.
Set there and let it idle and it cleaned out and was fine.
No its not the 02 as the car is getting good mileage and only does this in reverse.
Could the PCM change the fuel enrichment only when backing up? Or am I picking up bad gas in the tank in reverse? Anyone else notice this on their car?
Set there and let it idle and it cleaned out and was fine.
No its not the 02 as the car is getting good mileage and only does this in reverse.
Could the PCM change the fuel enrichment only when backing up? Or am I picking up bad gas in the tank in reverse? Anyone else notice this on their car?
#4
Senior Member
Certified GM nut
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cat
maybe it needs one of those converter cleaner additives.
Strange how there is no smell in the forward gears, even while idleing at a light.
Strange how there is no smell in the forward gears, even while idleing at a light.
#5
Re: cat
Originally Posted by SSEBONNE4EVA
maybe it needs one of those converter cleaner additives.
Strange how there is no smell in the forward gears, even while idleing at a light.
Strange how there is no smell in the forward gears, even while idleing at a light.
Maybe now is a good time to upgrade to a high flow cat? Get a Magnaflow.
I doubt the additive will do much for you. I don't put much faith in the "mechanic in a bottle" fixes....
#6
Senior Member
Certified GM nut
Thread Starter
smell
May have figured this out.
The wife takes the car two days to work driving only two blocks.
I then take it cross town to Lowes for supplies and it burns all that rich fuel out of the cat from going short trips.
The wife takes the car two days to work driving only two blocks.
I then take it cross town to Lowes for supplies and it burns all that rich fuel out of the cat from going short trips.
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01-20-2008 04:18 PM