Author Topic: What caused this? (Read 1607 times)

Tallchevy · « **on:** Dec 04, 2009, 10:13:34 PM »

87 4Runner
22re
LC cam
LC header
Wires, rotor, cap & spark plugs were installed new April of 09.

I noticed the engine was running rough the other day. I started the engine today & noticed that #2 exhaust was cooler than the rest. I pulled #2 spark plug & found that it was fouled. I pulled the other 3 & they were fine. I replaced all 4 plugs & #2 is still misfiring.
My question is what will cause just 1 (one, won, juan) plug to do this?

Slolyfe · « **Reply #1 on:** Dec 04, 2009, 10:14:45 PM »

Im in for the answer!

emsvitil · « **Reply #2 on:** Dec 04, 2009, 10:19:45 PM »

Do a compression test.

kneedownnate · « **Reply #3 on:** Dec 04, 2009, 11:39:38 PM »

detonation? Did you check the plug wire for continuity?

fade · « **Reply #4 on:** Dec 05, 2009, 01:53:33 AM »

I'm thinking pre detonation. Because the heat needed to do that to a plug. I'd start with a plug wire continuity test then go to compression and then finally check your intake manifold and injectors.

79coyotefrg · « **Reply #5 on:** Dec 05, 2009, 09:15:36 AM »

yep, detonation/pre-ignition

check the above recommended things but also check the distributor cap, if it was a cheap checkers/autozone/other generic parts store the cap might have been made in Hoopdydodah China and may not be symmetrical

emsvitil · « **Reply #6 on:** Dec 05, 2009, 03:13:17 PM »

That cylinder is running very lean.

Air leak intake leak and/or bad/clogged injector (functions a little)

Author Topic: What caused this? (Read 1607 times)

Tallchevy

What caused this?

Slolyfe

Re: What caused this?

emsvitil

Re: What caused this?

kneedownnate

Re: What caused this?

fade

Re: What caused this?

79coyotefrg

Re: What caused this?

emsvitil

Re: What caused this?

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	Author Topic: What caused this? (Read 1607 times) 0 Members and 1 Guest are viewing this topic. Tallchevy Silver Turtle Award Turtle Points: 236 Posts: 3,562 Member since Dec '06 Where were going we don't need roads! What caused this? « on: Dec 04, 2009, 10:13:34 PM » 87 4Runner 22re LC cam LC header Wires, rotor, cap & spark plugs were installed new April of 09. I noticed the engine was running rough the other day. I started the engine today & noticed that #2 exhaust was cooler than the rest. I pulled #2 spark plug & found that it was fouled. I pulled the other 3 & they were fine. I replaced all 4 plugs & #2 is still misfiring. My question is what will cause just 1 (one, won, juan) plug to do this? Logged My child is an honor student at Anton Levay's School of Satanic Arts 87 4Runner redo http://board.marlincrawler.com/index.php?topic=41959.0 87 Toyota 4Runner, SAS Rig Gallery http://board.marlincrawler.com/index.php?topic=29877.msg3 Slolyfe The 2K Group Turtle Points: -117 Posts: 2,048 Member since Aug '07 Heyo Re: What caused this? « Reply #1 on: Dec 04, 2009, 10:14:45 PM » Im in for the answer! Logged You'll never take me alive emsvitil Silver Turtle Award Turtle Points: 7571 Posts: 3,561 Member since May '07 Re: What caused this? « Reply #2 on: Dec 04, 2009, 10:19:45 PM » Do a compression test. Logged Ed SoCal 86 SR5 XtraCab 22RE W56B 31x10.50R15 kneedownnate Gold Turtle Award Turtle Points: 1128 Posts: 9,757 Member since Oct '04 Re: What caused this? « Reply #3 on: Dec 04, 2009, 11:39:38 PM » detonation? Did you check the plug wire for continuity? Logged RIP KYOTA You can go through life being scared of the possible, or you can have a little fun and tease the inevitable. Give a man venison, he'll eat for a day. Teach a man to hunt Blacktail, he'll be frustrated for life! fade The 1K Club Turtle Points: -9 Posts: 1,018 Member since Oct '09 Re: What caused this? « Reply #4 on: Dec 05, 2009, 01:53:33 AM » I'm thinking pre detonation. Because the heat needed to do that to a plug. I'd start with a plug wire continuity test then go to compression and then finally check your intake manifold and injectors. Logged 96 horunner 3.4 elocker armored 86 mini truck 18" rays 09 highlander 70 suburban 79coyotefrg Rock Ninja Gold Turtle Award Turtle Points: 1452 Posts: 22,633 Member since May '02 Solid axle Toys Rule ! ! ! Re: What caused this? « Reply #5 on: Dec 05, 2009, 09:15:36 AM » yep, detonation/pre-ignition check the above recommended things but also check the distributor cap, if it was a cheap checkers/autozone/other generic parts store the cap might have been made in Hoopdydodah China and may not be symmetrical Logged AR-TTORA founder 22R bored.060,LCE stage II race cam http://pure-gas.org/ 32/36weber, Marlin 1200 NON ceramic clutch, L52SHD+dualcase #2919, cable-locker, Yukon 5.29 gears, 35's, Allpro ebrake, front springs, and high steer, F150rears RIP Nitro 9-29-07 I sure miss him $I\'m Down$ MarlinCrawlerInc IS NOT affiliated with TrailGear in any way emsvitil Silver Turtle Award Turtle Points: 7571 Posts: 3,561 Member since May '07 Re: What caused this? « Reply #6 on: Dec 05, 2009, 03:13:17 PM » That cylinder is running very lean. Air leak intake leak and/or bad/clogged injector (functions a little) Logged Ed SoCal 86 SR5 XtraCab 22RE W56B 31x10.50R15