I just put a new comp cam XFI 268 HR13 in my 95 LT1. got it all back together and it idles fine but when you get on the thorottle it pops and sputters and lost a lot of power.Ijust installed new plugs,wires, and a new timing chain with the cam.The only thing that i can think of is i dropped the ICM and coil when i was putting it back together. maybe it is bad or do i just have to get on the dyno
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forged 383 LT1,11.5:1 compression,main girdle,custom comp cam,1.6 pro magnum rocker arms,ported heads,hooker supercomps,3"true duals,52mm throttle body,accel 300+ ignition,centerforce dfx clutch,B&M shifter,soon a 175 shot. -
did you by any chance re-use the metal spark plug boot shields? They have been known to arc to the motor and cause a severe stumble and misfire, usually under load.
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no i got rid of those thingsforged 383 LT1,11.5:1 compression,main girdle,custom comp cam,1.6 pro magnum rocker arms,ported heads,hooker supercomps,3"true duals,52mm throttle body,accel 300+ ignition,centerforce dfx clutch,B&M shifter,soon a 175 shot.Comment
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It is also possible that the cam has the incorrect dowel pin length. Sometime in 95 the factory changed the pin length. If the incorrect pin is used to drive the opti, it puts pressure on the rotor upon assembly. As soon as it is started, the destruction begins. You may have toasted the optispark.Comment
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make sure the timing isn't off.97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM
01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines
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dowel pin length is correct length. how do you check the timing on an lt1 do you have to have a scan tool or whatforged 383 LT1,11.5:1 compression,main girdle,custom comp cam,1.6 pro magnum rocker arms,ported heads,hooker supercomps,3"true duals,52mm throttle body,accel 300+ ignition,centerforce dfx clutch,B&M shifter,soon a 175 shot.Comment
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Ignition timing can only be off if you didn't index the Opti correctly to the cam dowel pin, but on a 95-97 vented Opti, that would be a 120-degree error, and it would barely run, if at all. On the other hand, make sure the Opti harness connector is not corroded or damaged. The other possible error would be cam timing error due to failure to align the cam sprocket correctly to the crank sprocket. Then there's the possibility of incorrectly adjusted valves.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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