desmond

my battery at rest with key in on position reads 11 volts, when cranking its at 6.7. is my battery shot? oh and these readings are from the pfc commander

desmond

and also after cranking for a bit, the cranks slow down a

DaveW

A fully charged battery should be over 12.5 volts. So I'd say your battery or charging system is in bad shape (assuming the voltage reading is correct).

While cranking the voltage will decrease a few volts, but the actual voltage depends on cranking resistance, starter condition, etc. Having the cranking slow down a bit is normal. Why are you having to crank for a long period?

Therefore, from your symptoms, it sounds like the battery internal resistance is not too bad, but it's not anywhere near full charge.

saxyman990

That's definitely low, but doesn't necessarily indicate that the battery is bad.

Just take out the battery and bring it to any auto parts store. They'll charge it and test it for free.

desmond

thanks, ill do that. the neg connector is tight on the battery as well. im gonna try to get the plugs out and test them for spark, as well as unflood the motor, since fuel is probably in there from all the cranking.

anything else that could cause this. Maybe my plugs are bad?

desmond

could using stock 7 and 9 spark plugs cause premature failure or fouling?
i have a cb, highflow cat, dp, intake, and pfc running 12lbs of boost.
would running all 9's be better suited for my mods?

DaveW

Now that you've elaborated, it sounds like your battery just needs a charge. The stock plugs should be OK.

Did you run the car briefly and shut it off before it warmed up? If so, it's probably, as you mentioned, just flooded - search for "flooding" or "unflooding procedures."

desmond

i believe the battery just needed to be charged or sit, and it needed to warm up so. i read today that the car requires longer cranking times with the colder weather. i was only cranking for 5 seconds or so, whereas i read people crank for 20 secs or more to induce flooding. i attribute the non starting issues to the weather and short cranking time. when i went home it started up on the first try, because the day before i drove from school back home and didnt boost or run for a short period and turn the car off.

thanks for all the help, at least i know what to do if i really have a problem

books

iTrader: (8)

Desmond,

You may be running all 9's. I usually ran 9's and don't recall changing back to the 9-7 combo.

btw I have a few sets of 9's sitting around, your more than welcome to a set. They generally have from 1-2k miles on them. I also have an extra battery, which was good when I pulled it. I am using a smaller battery because of the SMIC.

desmond

i changed my plugs in august using 7's and 9's. next time i change them i think ill go with all 9's though. but thanks for the offer dave, i may be giving you a ring for those.
ill be moving my battery to the bin soon enough. i almost have all the pieces i need to make my own stock mount setup. i just have to find someone to do endtanks and buy some piping