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P0300 code - 2003 Pontiac Montana


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Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 20, 2014, 3:32 AM

Post #26 of 31 (1652 views)
Re: P0300 code Sign In

Have you removed those Bosch plugs yet?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 20, 2014, 5:40 AM

Post #27 of 31 (1645 views)
Re: P0300 code Sign In

Ditto with HT. If you are observing spark by taking it out, grounding metal and looking at the spark that isn't good enough. Under compression a soaked plug might not jump spark to ground electrode but seek ground thru soaked porcelain. Could get no spark, weak spark or erratic. It was wet so it isn't working properly,

T



angusranch
User

Jan 20, 2014, 10:20 AM

Post #28 of 31 (1638 views)
Re: P0300 code Sign In

Yes .Put in Ac Delco.CAN you check wires to see if they have a small leak?PUt on new wires short time ago.Coil packs and module is also new.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 20, 2014, 10:33 AM

Post #29 of 31 (1636 views)
Re: P0300 code Sign In

The first thing you should be doing is determining if the issue is spark or fuel before you start going after individual components.

It's becoming quite obvious that you are way over your head with this problem and it should be time to pay the professional that knows how to find this stuff.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



angusranch
User

Jan 20, 2014, 10:44 AM

Post #30 of 31 (1632 views)
Re: P0300 code Sign In

True but when you have too take a vehicle back 2 or3 times I do not know if you would call them professionals.Every thing is new on igniton side .I think possible short in wires to injector.Last time put in new injector only problem I had was on 1.When I put back together then problem also developed on 3.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 20, 2014, 11:02 AM

Post #31 of 31 (1630 views)
Re: P0300 code Sign In


Quote
True but when you have too take a vehicle back 2 or3 times I do not know if you would call them professionals


And who would have made that choice in shops? Just find a more competent shop. If you shop for the cheapest one, that's exactly what you'll get.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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