1998 5.7L starting problems - Page 2

serge_saati · #16 12-11-2009, 05:24 PM

I don't think it's the plugs. Because it's a V6, if 1 or 2 pair of plugs are not working, your engine should still able to start when you floor the gas pedal. And it will shake a lot, and stall. Your's not starting at all. So check others things that plugs and injectors. Test CKP, CMP, MAF sensors.

I know, because one time I have disconnected two plugs, and engine was able to start. But it makes a a mower sound

. And stall when I released gas pedal.

My neighbor yells STOP THE MOWER.

mega8man · #17 12-11-2009, 06:17 PM

OK new problem i got it to start now but the starter seems real weak. it will start but the starter will turn stop turn stop then itll seem to get juice out of nowhere and go. it kinda gos rump.....rump......then spins... i can rule out the battery im pretty sure because it is only 3 days old now but do you think i may have damaged it trying to start the truck to many times...? i left it on a charger all last night as well.

serge_saati · #18 12-11-2009, 07:09 PM

It's not a symptom of a damaged starter. A damaged starter will slips and make a lound metallic noise when a teeth is broken.

When it goes slowly, it means that the battery is weak. Don't forget that is very cold now. Battery has only 40% of its power, and engine needs 110% more power that usual, so 210%. It's why it's hard to crank.You should see weak bulbs light when it happens.

Or maybe also a bad contact on batt terminals. Check if there's no dirt or loose connection. Cables should not turn when you turn them with force.

mega8man · #19 12-11-2009, 07:25 PM

well i wouldt think the battery would be that weak already i guess since it is brand new is there a chance that i may have damaged or dimished its cca already? i mean i cleaned the connections and everything when i put it in and i did check to make sure they were tight maybe ill go have another look see though.

j cAT · #20 12-11-2009, 08:58 PM

Quote:

Originally Posted by mega8man

well i wouldt think the battery would be that weak already i guess since it is brand new is there a chance that i may have damaged or dimished its cca already? i mean i cleaned the connections and everything when i put it in and i did check to make sure they were tight maybe ill go have another look see though.

when you crank for too long you overheat and damage the windings and the commutation on the armature....this means your starter looses torque..[cranking power]....

when cranking 10 sec. on 5 min off then repeat..

serge_saati · #21 12-11-2009, 08:58 PM

No, I don't think that you damaged the battery.
But if you car has not run for many day and you crank your engine for long time, many time, you discharge it.

You didn't diminished CCA, but batt voltage. Check batt voltage.

Don't forget that you have a 5.7L engine. It's very big. It use a lot of power each time you try to start. 4 missed start in a row, and it doesn't work.

mega8man · #22 12-11-2009, 09:18 PM

well the voltage is at 12v and i would think that after driving it around for 30 minutes it would be nice and charged up again maybe ill go check the connections on the starter as well.

j cAT · #23 12-11-2009, 09:46 PM

Quote:

Originally Posted by mega8man

well the voltage is at 12v and i would think that after driving it around for 30 minutes it would be nice and charged up again maybe ill go check the connections on the starter as well.

the starter will soon reveal its true condition when you least expect it..

mega8man · #24 12-11-2009, 09:59 PM

Quote:

Originally Posted by j cAT

the starter will soon reveal its true condition when you least expect it..

and what would that be...?

tblake · #25 12-12-2009, 11:03 AM

So lets recap, You got it to start, Left it ran, drove it around, recharged the battery. Now are you able to start it ok?

I would drive it over to an oreilley's and have them load test the battery and check the starter cranking amps. Even though them dopy littly machines really don't do squat against a VAT-40. If it were mine, I'd bring it to a mechanic who has a VAT-40 and have him check the starting and charging circuits.

serge_saati · #26 12-12-2009, 11:19 AM

What I understand is there's 2 problems.
Slow cranking and starting when engine is cold.

j cAT · #27 12-12-2009, 06:44 PM

Quote:

Originally Posted by mega8man

and what would that be...?

since you are an electrican I'm surprised with your question .

as you should well know motors internally short out..when this occurs the motor then looses its ability to create a magnetic field to cause rotation..with motors under high starting load as in this application operation of the motor with little or no time to cool down ,, damages these internal windings...

so the solenoid contacts will be blasted away with the increased current demand of this damaged motor ...then it will no do nothing..

your desciption of the starter not cranking at a constant speed is telling me the windings are bad...and I'm here in boston...this is not rocket science...

serge_saati · #28 12-12-2009, 07:06 PM

what boston has to do with rocket science?

mega8man · #29 12-13-2009, 02:27 AM

Quote:

Originally Posted by j cAT

since you are an electrican I'm surprised with your question .

as you should well know motors internally short out..when this occurs the motor then looses its ability to create a magnetic field to cause rotation..with motors under high starting load as in this application operation of the motor with little or no time to cool down ,, damages these internal windings...

so the solenoid contacts will be blasted away with the increased current demand of this damaged motor ...then it will no do nothing..

your desciption of the starter not cranking at a constant speed is telling me the windings are bad...and I'm here in boston...this is not rocket science...

ok sorry you didnt have to be rude about it man truthfully with all the other stuff people were saying that was the last thing on my mind since it wouldnt do anything before this even when it was cranking good, you dont have to lecture me about electric motors i know how they work you could have just said it nicely or just pointed it out instead of being a jerk and trying to make me look dumb. And your right it isnt rocket science but there is obviously a bigger problem than just the starter and that is common sense..

j cAT · #30 12-13-2009, 08:59 AM

sorry if you take this as some attack on your knowlege...

you have a bad starter motor with your description of cranking...their is nothing else that would cause the starter to act the way you describe.

I've done this many times...

its cold in milwaukee I won't want to get stuck....

well anyway others can use this info to help, with their starter issues...

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