car wont stay running after valve adjustment
06-05-2006, 09:53 PM
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car wont stay running after valve adjustment well i bent a pushrod last week and got the new ones in today. they are summit brand chromemoly stock length. the car has the lt4 hotcam kit with ported heads/intake, headers, cai and delteq. after adjusting the valves... getting each cylinder one at a time on roll over and spinning the pushrod until it stops spinning while tightning down the nut. then giving it a half a turn then locking it in place. i did that on all the cylinders and then when i hooked everything back up the car would fire and run for a second, but then it just dies. if i give it gas it will stay running for a brief second then die again. there is no chattering like the rockers are loose or anything... and i dont think the valves are too tight so i just dont know what it could be. all sensors are hooked up and the ses light is not on. so any and all help is greatly appreciated. thanks alot
daniel
daniel
06-05-2006, 10:01 PM
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when you tried to start it, did you have the maf on the TB?
The car will do exactly what your talking about if the MAF isn't on. it'll start for a second, even if you have the gas down to the floor it won't rev, itlll just die.
The car will do exactly what your talking about if the MAF isn't on. it'll start for a second, even if you have the gas down to the floor it won't rev, itlll just die.
06-05-2006, 10:46 PM
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I just noticed he never mentioned the year of his setup. If it's a 93 then this whole maf convo is pointless. Ive run my car at idle just fine without the maf connected. Also I wouldnt rule out something in the ignition causing this. Id just double and triple check all my work and make sure EVERYTHING is plugged back up.
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06-06-2006, 10:01 AM
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loosen the rockers.... and try only a quater turn... you may have gone further than you think and your putting so much pressure down that it bogs the engine...
06-06-2006, 01:08 PM
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wow... look at all the responses! damn this lt1 forum is so much better than the ls1 lol. it took forever to get help over there when i had one haha.
but blackbird pretty much hit it on the head... the intake elbow is such a pain in the *** to get on that i just left it off to try and start the car. so i put it back on and sho nuff it works great.
only problem now is that she has a high rpm miss, what all could cause that?
but blackbird pretty much hit it on the head... the intake elbow is such a pain in the *** to get on that i just left it off to try and start the car. so i put it back on and sho nuff it works great.
only problem now is that she has a high rpm miss, what all could cause that?
06-06-2006, 01:12 PM
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Exellent glad to hear you got it running. I would just check all your plugs and wires are tight, none of them are burned. Hopefully someone else will hhave some insight on this.
06-06-2006, 01:15 PM
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yea thats what i hope that it is, but hey are the spark plug wires not supposed to be touching? like would the wires arch off of eachother like that?!?
06-06-2006, 05:41 PM
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if you need any help... you can email me i live only about 30 min away from you.. so if your ever stumped email me at harvickgm@yahoo.com
06-07-2006, 01:06 PM
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sweet. that eliminates one more thing lol.
now i read somewhere that over tightened valves could cause this type of stumble. and after further "testing" lol i found out that it starts to miss at about 4000 rpms and on up. what do yall think of that?
now i read somewhere that over tightened valves could cause this type of stumble. and after further "testing" lol i found out that it starts to miss at about 4000 rpms and on up. what do yall think of that?
06-07-2006, 05:54 PM
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but i was wondering, could it be because the stock knock module is picking up extra noise? it didnt have this problem before i did the valves, so pretty much that is what is left. if i adjust the valves and it doesnt go away? i made sure nothing was arching and all the plugs are snug and have good connections.
btw, it starts to miss at about 4000 rpm or so. plugs are autolite 106's gapped to .050
btw, it starts to miss at about 4000 rpm or so. plugs are autolite 106's gapped to .050
06-07-2006, 06:00 PM
#17
Originally Posted by 68birdls1
well i bent a pushrod last week and got the new ones in today. they are summit brand chromemoly stock length. the car has the lt4 hotcam kit with ported heads/intake, headers, cai and delteq. after adjusting the valves... getting each cylinder one at a time on roll over and spinning the pushrod until it stops spinning while tightning down the nut. then giving it a half a turn then locking it in place. i did that on all the cylinders and then when i hooked everything back up the car would fire and run for a second, but then it just dies. if i give it gas it will stay running for a brief second then die again. there is no chattering like the rockers are loose or anything... and i dont think the valves are too tight so i just dont know what it could be. all sensors are hooked up and the ses light is not on. so any and all help is greatly appreciated. thanks alot
daniel
daniel
