I recently busted half my valvesprings. When I replaced them, I went ahead and added 1.6:1 rocker arms. Now, I have to let my car warm up for about 10 minutes before going anywhere or it dies immediately. It's been almost 80 degrees outside the last few days! Before, I would let the car warm up for a couple of minutes when it was about 30 or 40 out and had no problems. I've played with my timing, but the problem doesn't go away. Would adjusting my carb help? I have an 82 camaro and the computer isn't hooked up to anything anymore. Everything is mechanical.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.

 

Hmm, well first of all, what happend to cause all the valvesprings to break? Is there possibility of other mechanical damage in the engine? Have you noticed an overall power loss? Sorry I'm not much help, this one sounds like a stumper.

 

yeah what caused the springs to break?? to much cam not enough spring?? not right installed hieght?? what could cause all the springs to bust??? to tight vavle lash???

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1989 firebird formula

Mods: converted from T.B.I. to a carburator 305 to a 350. Flowmater exhaust,hedman shortie hedders,202 160 (882) heads,.447/.447 lift 222@.050 duration speed pro 327/350hp cam 350 .40 over (356) edlebrock performer rpm intake and a 600 edlebrock manual choke (1405) Proform H.O. distributor slightly revised 700r-4

Future mods comp extreme energy roller cam, world products sportsman 2 heads, msd 6al ignition, billet distributor, blaster 2 coil and a 406 engine is in the works soon!!!!

 

Sounds like you may have lost a lobe ot two on the cam. The springs may have coil bindined and broke. may need to check the cam.

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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,TRW Forged pistons,10.7:1 compression,HPC Coated RPM intake, Speed Demon 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, Comp Cam 1.6 roller rockers, Comp Xtreme 284 cam,240/246@.050 with .540 lift,Crane pushrods,ATI damper,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with B&M 3000 stall, Powertrax NoSlip Locker, 4.11 gears.

 

Apparently, the person who had the motor before me felt that the spring pressure on the driver's side wasn't high enough. He put shims on the springs on that side and only that side for some reason. He put about 20,000 miles on the engine and I put another 6000 or 7000 before they finally broke on me. Once the car warms up for about 10 minutes, it seems fine except for some slight hesitation here and there. Power has increased with the addition of the rocker arms.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.

 

Well, observe the choke during the warm up process. If the choke is staying closed when you try to drive off, I could see that as a cause for killing the engine.

Also, what is your cold idle rpm speed?

 

If it broke half the valve springs, it probably wiped out the cam. It may have pulled studs, bent push rods, and various other malfunctions.

What cam is in there? How much lift? What springs did you put in there? What will fit?

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"So many Mustangs, so little time..."
ICON Motorsports

 

check your choke (wire it open for testing).
check your camshaft for lift at the rockers.
check your valve lash.

 

But if it were an internal mechanical problem, wouldn't it occur all the time rather than just during the warm up period??? And he said overall power isn't affected, so it couldn't be a broken cam/lifter/etc. I still think it would be something with the choke.

Try posting this question on the carburetor forum and see if anybody there has experienced this before.