99BarneyRT
03-12-2008, 11:54 AM
Got a problem guys, like some help if I can get it :). For those that don't know, last year I revamped the upper end of the motor. Let me do a little back track to show everyone knows where I'm at.
In my signature was my last dyno session. This was with 52mm TB, .020 block, stage 2 port RT heads, PHAT cam, 1.7RR, M1 2 bbl, Mopar headers, B&G flash. Truck ran fine, but as we all get bitten, I wanted more HP and closer to 400RHP.
Since then, I've up'd the port on the heads to Stage 3, went to 4 bbl M1, LT headers, and single blade 1000 CFM TB. Basically a rebuilt upper end on the motor.
Since the rebuild I have been chasing problem after problem after problem. I have worked them all out but one. The truck currently has 2 issues...a constnt #7 misfire and surging at OD. I have changed the wires, plugs, cap/rotor. Of course, doesn't mean I didn't get a bad plug or something.
Drivibility: Off the line has literally zero get up and go. It falls hard, stumbles, and sometimes backfires. Then goes. Once in the RPMs the truck has power and launches hard to pass or whatever. Once the truck slips into OD, it surges pretty hard. So much in fact i keep OD off cause its annoying. There are times the computer see's that #7 misfire and refuses to run right at idle, sometimes stalling itself. Generally though, it'll hold its idle.
At this point I'm thinking a few things: bent valve, fouled plug, bad cap/rotor/wire, screwed up fuel sync. I have a friend, sort of, at a local dealership thats going to run a DRB to it. I'm not sure what that will tell about my truck, maybe everything. At this point I'm lost. Today is the first day i drove it to work in over a year and it was scary. Every other stop light was...ok I want to stall now....and required 2 footing. Mostly it'll regain itself, others requires a quick pedal hit to catch it.
The other point, whether makes a difference or not, is since the rebuild, the truck is difficult to turn over. I have a remaote system but can't use it. The truck won't start onits own without some pedal effort. And then its a slow start, not a insta one. Oh...and it reeks of fuel at the tail pipe. I mean pig rich. Funny thing here, on last dyno, I was 14+ leaning out at 5100+ top end. Odd I'd smell fuel when I know for a fact its lean...but I believe its the computer loading up.
I know this is a lot of information, but I wanted to be as detailed as i could for better answers. So...any thoughts guys?
Thanks!
In my signature was my last dyno session. This was with 52mm TB, .020 block, stage 2 port RT heads, PHAT cam, 1.7RR, M1 2 bbl, Mopar headers, B&G flash. Truck ran fine, but as we all get bitten, I wanted more HP and closer to 400RHP.
Since then, I've up'd the port on the heads to Stage 3, went to 4 bbl M1, LT headers, and single blade 1000 CFM TB. Basically a rebuilt upper end on the motor.
Since the rebuild I have been chasing problem after problem after problem. I have worked them all out but one. The truck currently has 2 issues...a constnt #7 misfire and surging at OD. I have changed the wires, plugs, cap/rotor. Of course, doesn't mean I didn't get a bad plug or something.
Drivibility: Off the line has literally zero get up and go. It falls hard, stumbles, and sometimes backfires. Then goes. Once in the RPMs the truck has power and launches hard to pass or whatever. Once the truck slips into OD, it surges pretty hard. So much in fact i keep OD off cause its annoying. There are times the computer see's that #7 misfire and refuses to run right at idle, sometimes stalling itself. Generally though, it'll hold its idle.
At this point I'm thinking a few things: bent valve, fouled plug, bad cap/rotor/wire, screwed up fuel sync. I have a friend, sort of, at a local dealership thats going to run a DRB to it. I'm not sure what that will tell about my truck, maybe everything. At this point I'm lost. Today is the first day i drove it to work in over a year and it was scary. Every other stop light was...ok I want to stall now....and required 2 footing. Mostly it'll regain itself, others requires a quick pedal hit to catch it.
The other point, whether makes a difference or not, is since the rebuild, the truck is difficult to turn over. I have a remaote system but can't use it. The truck won't start onits own without some pedal effort. And then its a slow start, not a insta one. Oh...and it reeks of fuel at the tail pipe. I mean pig rich. Funny thing here, on last dyno, I was 14+ leaning out at 5100+ top end. Odd I'd smell fuel when I know for a fact its lean...but I believe its the computer loading up.
I know this is a lot of information, but I wanted to be as detailed as i could for better answers. So...any thoughts guys?
Thanks!