Q: Aftermarket Holley carb. Big carb. Get's bad gas milage. (Chevy 350, 4 barrel carb.) Vaccuum port is going from zero vaccuum to full vaccuum. Causing engine to lug at low RPM when engine goes fully advanced. What could cause carb to do this? Where could I learn more?
A: Try more initial timing first..about 10 degree's to start and run. Ed
Q: I just purchased a 71 Chevy El Camino, and I am having problems with the engine turning over.
The battery is fine becuase all of my lights and dash panel light up properly. When you turn the key in the ignition the lights on the dash panel come on, but the engine just won't turn over.
I have replaced the spark plugs and voltage regulator, but I know that these wouldn't keep the engine from turning over. It doesn't even make an attempt to turn over.
If you could offer me any advice I would appreciate it. Thanks.
A: It sounds like an electrical problem.
First unbolt the starter,allowing it to hang down by the wires. Be careful not to let wires touch metal parts. Battery must remain connected.
Next, with help from a friend, check voltage at wires with key in crank mode. Use a stab light,or a DVM meter.
The wire that has voltage in crank mode should be hooked to starter solenoid lug marked "S". If no voltage on any wire, check harness at firewall connector.
If voltage is present and wire is connected to right lug, try hitting starter 5 or 6 times before cranking.
May just be stuck windings in starter. Hope this helps.
Drive Train / Driveline Other Not applicable Not applicable
Q: Purchased a 1970 Chevelle with a 12 bolt posi rear, was told it was upgraded with a PT unit.
Can you give me more details what this refers to? Thanks
A: Terminology is a funny thing and is often the creation of the person using it......
Close as I can come to this for you is..... Posi-Traction.....
Which is also refered to as limited slip, etc
Q: I have a 396 on witch I just replaced the intake manifold and carborator. And I lost track of my plug wires as I was putting them back on. I know the firing order is 1-8-4-3-6-5-7-2. Where does that start and end though? And there are no numbers on the cap either.
Also My throttle linkage is now about 5 inches to long I can see no way to adjust it, And cant find a new one. Any ideas?
A: first find top dead centre for #1 cylinder by removing the front right plug (facing front of car the front plug of the right bank) a good way is to hold your thumb over the plug hole and get someone to inch the motor over until you feel a pressure buid up .then get the pointer on the timing cover to line up with top dead centre (TDC) mark on the harmonic balancer.remove the distributor cap- the rotor will now be pointing to #1 cap lead,start with that lead to #1 and in a clock-wise direction the next one will be #8 and so on all the way round the cap .on the right bank the numbers go 1-2-3-4 and on the left bank the numbers from the front go 5-6-7-8,as for your linkage go to any good speed shop and they will have an assortment of linkages including adjustable ones,Regards Tim O'Brien New-Zealand.