88 5.7

[lynnboy021]

i got a 88 chevy 5.7 and i just did a tune up new wires, plugs and cap kit..... i removed the wires without marking or anything cuz the cap has the numbers maked and i just used the cap number with the intake firing order... my problem is that the motor wants to start but its back firing out the carb... i already removed number one plug put it to tdc on comperssion stroke and then timed the dizzy, so why is it still back firing???

 

[jerryjerry05]

Re: 88 5.7

Got something crossed.
There is a firing order stammped on the intake manifold.

 

[Maclin]

Re: 88 5.7

Sometimes the wires are moved around on the cap, still in order but not necessarily plugged into the related number on the cap. If a distributor was removed then not aligned correctly that can be a common practice (moving the wires around) rather than re-installing the distributor with correct alignment. You should get the engine timing mark to TDC then see what terminal the rotor is pointing at.

 

[Maclin]

Re: 88 5.7

Oops, meant to say verify firing order is correct, then check to see where the rotor points when engine is at TDC on #1.

 

[Maclin]

Re: 88 5.7

When verifying the firing order make sure you go around the cap in the same direction the rotor turns.

 

[bradb]

Re: 88 5.7

Oops, meant to say verify firing order is correct, then check to see where the rotor points when engine is at TDC on #1.

He did say he checked timing so that would indicate the rotor will be pointing at #1 when at TDC.