99 camry 4cyl 240,000+ miles. misfire stops after completetly warm.

Asked by Sep 06, 2014 at 07:53 PM about the 1999 Toyota Camry LE

Question type: Maintenance & Repair

99 camry 4cyl 240,000+ miles.
misfire stops after completetly warm.
3 codes.. egr.. Muti cyl misfire...
Exaust emission high. Emission code
figured from misfire. Cleaned and
tested egr and tube,replaced egr
vacuum solenoid. New plug wires
and plugs. After no change. Could
here slight spark jump sound so in
the dark I could see fire jumping from
far left cyl plug wire to valve cover.
Changed wire... No change... Taped
wire thick w elec tape( just curious )
and fire still jumps thru tape to valve
cover. Grabbed the wire expecting to
get zapped but only felt very very
small voltage like 9volt on your
tounge. Need some good experinced
ideas please.

6 Answers

35,775

Which ever wire is sparking, replace the coil head that sits right above the wire. Sounds like the coil is probably jumping spark which makes it appear to be coming from the wire.

Dont know the number of cyl but looking at engine far left cyl . How can the spark travel thru a 8mm brand new plug wire and wrapped the entire plug wire w two thick layers 3m electrical tape. The fire jumps out of the wire 18" away from coil pack. I can grab wire w my bare hand and touch coils all over and not get zapped. Ive been hit by many coils and this is not the same. I feel nothing and we're talking about several thousand volts. W out a doubt it should go thru me.

Ill switch the the two coil packs and see if it jumps from the other wires. But as of now its only jumping from one plug wire. I can raise the wire an inch or two above the valve cover and the it stops the fire from jumping and the electrical popping noise too. Very strange ive replaced a lot of coils. Work on cars trucks bikes daily, never seen this. Coils are funny but the only thing i can think of is a hole in the coil and spark travel thru valve cover and jumps back into plug wire. Also it goes away after its warmed up. If the coil is bad or a hole or over shooting voltage why does it stop after its warm?

35,775

Ok....you never said what end of the wire was sparking in your original post. Have you checked the plug itself to see if it has cracked the glass? I have heard of carbon transfer...where the spark will actually travel through the carbon build up....

The wires are brand new along w plug wires. Correct oem plugs and 8mm wires. The fire jymps out of the wire to the valve cover about 5/8 of the length of the wire. Fire jumps out a little closer to the plug but almost in the mid way of wire. Just past the pcv inlet to valve cover

35,775

Mist the wire with water and hold it away from the valve cover. See if voltage is going through the wire. If you are not getting zapped, that would mean that stray voltage is somehow traveling through the engine from some other source. Check grounds, and check any wires that appear to be touching the engine. I once had a similar issue. My forearm was wet with sweat, and as I grazed it along the inner fender, I could feel a low dose of voltage going through my skin. It was actually a bad coil wire on my ' 89 Toyota 4X4. I had replaced all spark plugs and new wires. The only wire I hadn't changed out was the coil wire. That was the culprit the whole time.

Your Answer

Add photo

Related Questions

  • poor heat 2013 camry 4cyl 8 answers

    poor heat for 9 mos. had thermostat, antifreeze & cabin air filter replaced. not much difference. 27000 miles on car purchased new.

    2013 Toyota Camry LE

    -

    Maintenance & Repair

  • Why is 2010 Toyota Camry burning oil at 65,000 miles? 40 answers

    My well cared for 2010 Toyota Camry 4 cyl. has had synthetic oil changed every 5,000 miles at dealership as recommended. Last week my oil light came on. I was 2 qts down at the dealer today and they c...

    2010 Toyota Camry Base

    -

    Maintenance & Repair

  • 2003 Camry 4cyl won't turn over when driven long enough to warm up 3 answers

    After driving 5-20 miles, try to start after parking for an hour and it won't crank at all - just totally dead. Let sit for a few hours or more and it cranks normally and starts immediately. In the me...

    2003 Toyota Camry XLE

    -

    Maintenance & Repair

  • random stalling when coming to a stop or slowing down. 28 answers

    At random times - once a week when I am coming to a stop or slowing down in traffic (when it's below 1 rpm) the car will just stall. It starts up o.k., and then will be fine the rest of the day. I've ...

    1999 Toyota Camry XLE

    -

    Maintenance & Repair

  • How do you add auto trans fluid on a 2010 Camary (4cyl) with no dipstick? 6 answers

    We have a 2010 Camary with a 4cyl auto trans. It has 63,000 miles. While I was changing the oil I decided to drain the trans fluid and add some new. After draining the ATF fluid I found out it takes a...

    2010 Toyota Camry LE

    -

    Maintenance & Repair

Camry

Looking for a Used Camry in your area?

CarGurus has 96,275 nationwide Camry listings starting at $1,250.

ZIP:

Search Toyota Camry Questions

Toyota Camry Experts

#1 Reelin68
Reelin68
Reputation 11,340
#2 FordNut
FordNut
Reputation 5,660
#3 Tom Demyan
Tom Demyan
Reputation 4,070
View All

Related Models For Sale

Used Honda Accord
811 Great Deals out of 81,609 listings starting at $899
Used Toyota Corolla
877 Great Deals out of 74,413 listings starting at $1,500
Used Honda Civic
669 Great Deals out of 77,410 listings starting at $1,000
Used Nissan Altima
1,090 Great Deals out of 82,556 listings starting at $670
Used Toyota Avalon
257 Great Deals out of 13,597 listings starting at $2,375
Used Toyota RAV4
645 Great Deals out of 61,987 listings starting at $2,450
Used Hyundai Sonata
608 Great Deals out of 51,091 listings starting at $1,300
Used Nissan Maxima
347 Great Deals out of 25,221 listings starting at $1,400
Used Honda CR-V
814 Great Deals out of 59,369 listings starting at $1,200
Used Chevrolet Malibu
1,007 Great Deals out of 85,671 listings starting at $1,995
Used Toyota 4Runner
319 Great Deals out of 20,550 listings starting at $2,295
Used Toyota Tacoma
620 Great Deals out of 35,105 listings starting at $2,155

Used Cars For Sale

2017 Toyota Camry LE For Sale
9 Great Deals out of 19,176 listings starting at $16,995
2016 Toyota Camry LE For Sale
40 Great Deals out of 2,101 listings starting at $11,977
2015 Toyota Camry LE For Sale
23 Great Deals out of 1,469 listings starting at $10,977
2014 Toyota Camry LE For Sale
75 Great Deals out of 2,084 listings starting at $8,995
2013 Toyota Camry LE For Sale
20 Great Deals out of 621 listings starting at $8,765