help, truck is shooting flames
08-02-2011, 02:05 AM
#1
doesn't know what quit means
Thread Starter
iTrader: (5)
Join Date: Jul 2009
Location: in ma house
Posts: 1,084
Likes: 0
Received 0 Likes
on
0 Posts
help, truck is shooting flames
Well guys I been having this problem ever since I tuned it completely on the dyno with flaco, well the truck gets up to 120 plus and when I let off it starts shooting flames from the exhaust, don't know why is it doing it but at first we thought it was the spark plugs that were gaped a .20-.25 so I put them to .30 and still kept doing the same, does anybody have a idea of what it could be.??
08-02-2011, 02:50 AM
#6
It turns off the fuel injectors when a certain set of parameters are met (speed, map, throttle). If its not turned off in your case you may pass unburnt fuel through the engine and then it ignites in the exhaust from the heat. Kind of a long shot though...
Trending Topics
08-02-2011, 08:47 AM
#9
What injectors are you running? What is your AFR in the low kPa area? Bigger injectors can sometimes run real rich in lower kPa areas. My 60lb injectors were seeing 10, 9, and even 8:1 AFR down low. I had to adjust the base pulse width to correct this. Unburned fuel will do exactly what you are saying (just as Atomic said).
08-02-2011, 08:53 AM
#10
TECH Fanatic
iTrader: (13)
Join Date: Apr 2010
Location: jennings,louisiana
Posts: 1,750
Likes: 0
Received 0 Likes
on
0 Posts
What headers or you running? When I was running the obx with 2.5 collectors. They would turn cherry red on the dyno & shoot fire out the cutouts after 3 dyno pulls back to back.
So if your exhaust is flowing good you could be getting a build up of exhaust gases.
So if your exhaust is flowing good you could be getting a build up of exhaust gases.