What kind of spark plugs?
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1st Gear Member
Joined: Sep 2009
Posts: 150
From: West Michigan
What kind of spark plugs?
im about to change the plugs on my car but im not sure what type would be best. i know that this job is gonna be a PITA so i want to make sure im putting the right plugs and good plugs in so i dont have to do it again.
The reason im changing the plugs is because my car starts hard it turns over but doesn't fire then it will finally fire after a while
The reason im changing the plugs is because my car starts hard it turns over but doesn't fire then it will finally fire after a while
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October 2009 ROTM
October 2009 ROTM
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Joined: Nov 2007
Posts: 10,560
From: Eastern PA,
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Fuel pressure gage. They sell them at most parts stores, Harbor freight, Sears Etc.
Do a you tube search for "checking fuel pressure".
Do a you tube search for "checking fuel pressure".
Overdrive Member
Joined: Nov 2006
Posts: 4,042
From: IL
Plugs were a breeze on my 3.8L -- went with Denso IT-20 (iridium) and MSD 8.5 MM wires.
See:
http://www.camarohomepage.com/project/part1.htm
"They are different designs--the ACD plug is platinum-tipped, the Denso uses an iridium tip and is, also, a colder heat range, better suited to an engine which runs hard.
The Denso "Iridium Power" IT-20 has a very small, Iridium center electrode along with a cut-back and tapered, ground electrode. Both these features allow the air-fuel mix in the combustion chamber increased exposure to the spark. As a tip material, Iridium has as good or better durability than platinum, but lower resistance. That lower resistance can make a more powerful spark available at the plug.
Dyno runs, quarter mile testing and aggressive street driving made colder spark plugs desirable, so we installed Denso IT-20 Iridium Power plugs which are sold by THR. The IT-20 is one heat range colder and its iridium tip is more durable but has less resistance than the stock platinum, AC Delco plugs that were in the engine when we started. The Densos' small, 0.4-mm center electrode and tapered ground electrode give the spark maximum exposure to the incoming, air-fuel charge. We should add that even General Motors must see merit in the Denso spark plug design because after about 2004, some Chevrolets have Densos from the factory."
See:
http://www.camarohomepage.com/project/part1.htm
"They are different designs--the ACD plug is platinum-tipped, the Denso uses an iridium tip and is, also, a colder heat range, better suited to an engine which runs hard.
The Denso "Iridium Power" IT-20 has a very small, Iridium center electrode along with a cut-back and tapered, ground electrode. Both these features allow the air-fuel mix in the combustion chamber increased exposure to the spark. As a tip material, Iridium has as good or better durability than platinum, but lower resistance. That lower resistance can make a more powerful spark available at the plug.
Dyno runs, quarter mile testing and aggressive street driving made colder spark plugs desirable, so we installed Denso IT-20 Iridium Power plugs which are sold by THR. The IT-20 is one heat range colder and its iridium tip is more durable but has less resistance than the stock platinum, AC Delco plugs that were in the engine when we started. The Densos' small, 0.4-mm center electrode and tapered ground electrode give the spark maximum exposure to the incoming, air-fuel charge. We should add that even General Motors must see merit in the Denso spark plug design because after about 2004, some Chevrolets have Densos from the factory."
Overdrive Member
Joined: Apr 2010
Posts: 3,354
From: Spanaway, WA
I pulled the OEM plugs out of my car the other day and they were ACD plugs made by Denso. They were double platinum with 131K on the meter and actually still in decient shape. I replaced them with Autolite double platinum plugs. My next set are going to be NGK or Denso iridium, I didnt go with that this time due to my lack of funding. My engine swap cost me around $800 for the engine and all the extras needed to put a 2001 Bonnevile 3800 in a 1999 Camaro.
Massey
Massey
Overdrive Member
Joined: Apr 2010
Posts: 3,354
From: Spanaway, WA
in my experience the bosch +4 plugs work well on high revving engines like 4cyl imports. I have had a lot of customer complaints about their cars not running right after using these plugs. The worst compaints come from V8 owners.
Massey
Massey