lacking power

[kdogmcool]

I am havimg problems with my truck. I have a chev 350 withe edelbrock intake holly carb hedders..... it doesnt seem to be running on all cylinders, just put a new distributor,cap,rotor,plugs,wires. did compression test, cylinders 4,6 were low at 100 and all others were at 120. dont know what to do from here

[kdogmcool]

firing order is good 1 8 4 3 6 5 7 2. could it be faulty wires? they are brand new accel spiral core 8 mm?

[kdogmcool]

all seem sparking. could i have an intake leek on the internal side?? sprayed carb clean along runners but now change. is my compression ok?? could i have a stuck or burnt valve? when at an idel it is rich smell out opf the tail pipe on passenger side. a little grayish smoke and rich smell

[kdogmcool]

ya i have recently changed intakes from a edelbrock eps to a edelbrock perfomer rpm. right after i installed it i noticed a loss in power, i figured it was just fine tunning.but could never tune it. The motor is only 1 year old and not even 50000 km on it. my old distribtor weights were rusty and didnt spring back on there own, I needed a new distributor right from the start but didnt put one on till just the other day. it sounds good on idel but has no power when in gear, it seems to just bogg. how often do the power valves in the holly carbs go.

[kdogmcool]

timing is bang on thought that was my problem too. went over that 3 times. yes it is a new holly 670 cfm carb mabey 6 months old. im going to try intake gasket tomorrow. that is when i noticed a change in power. it has gotten worse since then so ill try that. could it be head gasket? is the compession good? it is low on #4&6?

[nitrowarrior]

Just a stab in the dark here.......... Did you happen to install a cam advance button on the cam gear? Or possibly a set of cam retention bolts came loose and the cam timing is off? To eliminate this as a possibility, Advance the distributor a bunch and see if this helps. If not, keep going with the intake gasket approach. Just a thought, I've seen it happen a bunch.

[kdogmcool]

changed intake gasket but still the same.when it first flashes theres a cloud of white smoke. when i rev it up same thing. head gasket? would that cause me to sputter and loose power if there was coolent getting in the cylinder? havent noticed a loss of coolent. I have dual exhaust so i can see that it is only comming out of passenger side or the even bank. cylinders 4 &6 are low on compression. help

[kdogmcool]

ok got the head gasket done, both sides were straight. put back together and now have no compression on cylender 1. all other cylinders have between 130 -150.dont know where to start.???

[kdogmcool]

that got it!!!! do i have to do the rest of them again?

[kdogmcool]

thanx ill that in the mornin. thanx for your help man. ill let you know what happens