NO LOW END POWER, TERRIBLE ACCELERATION... HELP???

[Thatlowchevy]

I recently put a new engine block in my 1998 Silverado (5.7l Vortec 350) and I have noticed that i have absolutely NO low end power (She won't even climb oil change ramps) and terrible acceleration. I was told to replace my fuel filter and I did so; still no change. could it be something with timing advance? or a clogged injector? I really need this truck running right because I have to pull a trailer to Texas tomorrow and I don't think it will make it... any help please??

 

[badazzbulldog]

timing has to be set with a diagnostic scanner and the distributer has to be set in the motor a certain way

 

[Thatlowchevy]

I have set the base timing by setting the #1 cylinder to TDC, then positioning the distributor to point at #1. from there i hand adjusted it for best idle and rpm range up to 1500RPM. hope that helps

 

[skylark]

I have set the base timing by setting the #1 cylinder to TDC, then positioning the distributor to point at #1. from there i hand adjusted it for best idle and rpm range up to 1500RPM. hope that helps

Like badazz said it needs to be set with a scanner. It is nothing like the days of old.

 

[Thatlowchevy]

I think they messed up when they put all the fancy computer stuff on lol. I'll take it to a Dealer when i get back

 

[DRAGGIN95]

It's not a complicated system, but you just can't set the cam retard offset without a good live data scanner.

 

[badazzbulldog]

http://www.gmtruckcentral.com/articles/distributor.html this link is what you need to set it properly follow this and youll have it close then get it set right on by the scanner

 

[Truckracer]

I have set the base timing by setting the #1 cylinder to TDC, then positioning the distributor to point at #1. from there i hand adjusted it for best idle and rpm range up to 1500RPM. hope that helps

cam to crankshaft correlation has no effect on driveablility or power. Its only to prevent crossfire.

Engine timing is controlled strictly by the crankshaft position sensor and the PCM.


Mine suffered from low end power loss and bad mileage. Spider injector upgrade, new MAF sensor, and a tps and its a tire burner again.

 

[Supercharged111]

I've been off my 80 degrees and it ran fine. Others get misfires and stutters when they're off by 20 or 30. Running with it wrong for any extended period is hell on the cap and rotor.

 

[House003]

I'd check the MAF sensor and the cats to see if they are plugged up.