New engine, 355, miniram, zz9, 52 mm, ported stock heads (2.02valves), mod MAF, MSD, Level VI PROM, all new relays, etc. Just re-installed fresh rebuilt motor with above items. It will sometimes backfire (intake side) if I slap open the throttle blades from inside the engine compartment, it idles rough, and it sputters -almost like it's missing- in all rpm ranges whether sitting still or under load. Can't figure it out. Timing is set at 6 degrees like TPIS recommends, plug wires are all new as is cap. I did re-charge the battery without the motor hooked up a few times. Could the MAF be bad? Ignition bad somewhere? My scanner shows "spark advance" hunting around between 20 and 30 AT IDLE - is this normal? Also, yesterday, the volts were reading low and eventually my battery drained (while running over only 30 minutes) from 11.4 down to 8.4 and then the motor died - it did this 4 times and would only hold a charge for about a tenth of a mile. Put in new alternator and battery and now it charges to 13.4 to 13.6 is this range OK? What is normal. I have a scanner - where can I get a list of normal readings for MAF, idle spark advance, injector pulse, battery voltage, etc.? Any help would be greatly appreciated. :mad :confused: :mad :confused:

 

I'd double & triple check the distributor to make sure you got it in correctly. Sounds like the same thing that happened to mine when I installed the motor. I got it 2 teeth off and it was NOT healthy.

 

check dist placement also did you double check the cam alignment when you put in new cam sounds like the timing is off.

 

I just went throught through the same problem, turned out to be the distributor had been intsalled incorrectly. Didn't figure it out for 3 weeks though. I'd check the dist. and make absolutly sure it's right. :cheers:

 

Hey screamin' eagle. What do you mean it turned out to be the distributor was installed wrong? How so? Even if you are a "couple of teeth off" as some have said, it doesn't matter if the rotor is still pointed correctly in relation to the cap. I am starting from a brand new motor, with it already at #1 TDC, so it shouldn't matter as long as the rotor is pointing on number 1. Please explain.