hey help i have a knocking above 3000 rpm.. u cant hear it with my cutout open but when u block it off u can hear it real good.... didnt happen till i had a peice of my y-pipe replaced cause it was crushed.... what u think it is... been going on for bout 2 months now but no power has been lost....

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305, TPI,compucam 2030 cam, air foil, 8.8 wires, accel super coil, dynomax headers, custom y-pipe, cut out, 80 series flowmaster, 2.73's and an open diff(3.42-3.73 on the way). and a stage 4 chip :0). hittin a sad 15.2 before the chip.

 

Could be bad gas... did you just recently fill up your tank or go to a station that you normally don't go to? Did you change timing any?

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Founder, Tealnet.Com

'98 Mustang GT

My 98 GT

Mods: Vortech S trim, 42# inj, 5.4 Heads (ported/polished), custom ground cams, 99 intake, ATI 3 corer intercooler, Walbro 255 intank pump, Walbro 255 inline pump, Aeromotive adjustable fuel pressure regulator #13102, NO FMU!, Steeda Tri-Ax shifter, Steeda heavy duty LCA's, Steeda heavy duty UCA's, Steeda Chrome Moly subframes w/cross-brace, Steeda Cobra R hood (2 1/2" cowl), BBK 75mm TB, Pro M 80mm MAF, Eibach progressive springs, K&N Air, Cobra "R" rims, 31 spline Moser axles, SVO differential, Downs rear Girdle, FMS 3.73 gears, Cobra floor mats, Cobra leather shift ****, "A" pillar (Phantom White Gauges and custom gauge pod), Steeda race pedals, Mac offroad "H" pipe, hi-flo cats, and Borla XR1 catback.

Dyno #'s: 298.2rwhp/332.8rwtq (running rich 9:1 a/f)

Best ET to date: 13.42@104.91 (Temp F: 109 Humidity: 38 Barometer: 28.90) See the run on video!

Mods not installed: 3 core intercooler, ditching the FMU!

 

it started at the drag strip.....made 14 passes lol and like the last 4 i closed off the dump..... then when i got into town i was playing with a slowstang and had it in 1st..... nailed it...... let it fall on its face and then i heard it knocking..... went away under 3000 rpm..... have had it this way for bout 2 months so i ruled out a rod.. ... but i think it might be a bad lifter.... gonna put heads on and change them all out.....also thought i was floating an exhaust valve if there was too much back pressure... and it had a weak spring... so i am lookin for help

 

Slowstang ---- LMAO! I have one of them and it's slower then most.

[This message has been edited by 1BadAzzGT (edited October 13, 2001).]