| Author | Message | ||
| Edward Gault (Irfgt)
Member Username: Irfgt Post Number: 870 Registered: 2-2001 |
I have tried every imaginable plug wire from Maximas to Kias and have not found an extender that will work to suit me. I am still looking though. | ||
| '75 308 GT4 (Peter)
Intermediate Member Username: Peter Post Number: 1638 Registered: 12-2000 |
Thanks for the numbers Ed. I'm wondering about Toyota 4A-GE engines, don't they have deep-reaching extenders/boots on the ends of the wires? Would they have similar dimensions to the Ferrari spark-plug wells? I'm sure you've worked on these engines before and could make the comparison. | ||
| Edward Gault (Irfgt)
Member Username: Irfgt Post Number: 869 Registered: 2-2001 |
Peter the Bosch part number for the plug wire connector is 0300055103. The Mercedes Benz part number for the same thing is A0001565910. Keep in mind that these things have a 1K Ohm resistor built into them and you must use solid core wire or you will have too much resistance. Also you will need some of the special wire end terminals to connect them to your wires as these things screw on to the wire. You replace Mercedes wires in pieces instead of replacing the entire set. A whole set of wires for say a 500SL will set you back around $700.00. I keep these ends in stock as they fail fairly frequently and you are screwed if you work on these cars and do not have these to fix a skip. | ||
| '75 308 GT4 (Peter)
Intermediate Member Username: Peter Post Number: 1628 Registered: 12-2000 |
What are the #'s for these Bosch connectors? | ||
| Edward Gault (Irfgt)
Member Username: Irfgt Post Number: 859 Registered: 2-2001 |
I purchased them from T. Rutlands not long ago for $8.00 unless they have gone up since. | ||
| magoo (Magoo)
Intermediate Member Username: Magoo Post Number: 2054 Registered: 2-2001 |
Brian, I bought them from G.T. auto parts at that figure about a year ago. Price increase???? | ||
| Brian stewart (Eurocardoc)
Junior Member Username: Eurocardoc Post Number: 191 Registered: 11-2001 |
To seal the plug holes with the Bosch connector, use a VW beetle boot, about $0.80 each. If you can get the factory extensions for $8 I will take 5 sets right now. | ||
| Dean Klaus (Gargoyle)
New member Username: Gargoyle Post Number: 7 Registered: 10-2001 |
This is all great information thanks. I can't wait till I can start to troubleshoot the problem. My plug wires are in pretty bad shape and I think I will start there. | ||
| Edward Gault (Irfgt)
Member Username: Irfgt Post Number: 856 Registered: 2-2001 |
Brian, I considered the Bosch connector as an alternative but those things are around $20.00 each plus the terminals that you have to buy to screw in the connector and a crimper plus the roll of solid core wire and you still do not have a seal for the end of the spark plug hole that without will allow debris and water to enter the holes. The factory extenders are about $8.00 each and last a long time and appear to be the lesser of the evils right now. I have experimented with and used a silicone wire insulator from Standard Parts that works just fine but you have to use the screw on spark plug ends and works perfectly except for sealig the sparkplug hole. | ||
| Brian stewart (Eurocardoc)
Junior Member Username: Eurocardoc Post Number: 188 Registered: 11-2001 |
There is a Bosch plug connector which is long enough and screws into the end of the wire, you can make your own wire set easily with these and some solid core wire from JC Whitney. | ||
| '75 308 GT4 (Peter)
Intermediate Member Username: Peter Post Number: 1623 Registered: 12-2000 |
I hate those f---ing things! I still don't understand why they use this tiny little spring clip to hold onto the plug. Its the flimsiest POS I've seen. Why couldn't it have a conventional clip just like the end of the wire? If I get mad enough at them, I'll make my own! I've been having a similar problem with my GT4, I suspect the coils (haven't had the chance to change them). It could be in your case or maybe bad Digiplex. | ||
| Mitchel DeFrancis (4re308)
Member Username: 4re308 Post Number: 438 Registered: 6-2001 |
I'm sure you could, but the spark plugs are so deep in the engine, you need to extenders to allow the wires to reach the extenders. | ||
| Mike Fisher (Mikef)
New member Username: Mikef Post Number: 36 Registered: 11-2001 |
Do the plug extenders serve any purpose? Could you just connect the plug wires directly to the plugs? | ||
| Mitchel DeFrancis (4re308)
Member Username: 4re308 Post Number: 437 Registered: 6-2001 |
WOW Brian you mentioned the plug extenders before I could write it!!  you are spot on. Dean, pull the spark plug extenders and check the base of the ceramic for a burn hole, also look inside em. If your car is a 3.0 they will be black, a 3.2 will have red extenders. THE DAY I got my 308 home from a 1000 mile drive, I got stuck in rain storm in Atlanta and she started missing, spitting and sputtering. I was freaking out. Turns out I had 2 smoked plug extenders and that was a nice calming easy fix. Try that. | ||
| Dean Klaus (Gargoyle)
New member Username: Gargoyle Post Number: 6 Registered: 10-2001 |
Thanks Magoo, I will give that a try next weekend!Dean | ||
| magoo (Magoo)
Intermediate Member Username: Magoo Post Number: 2038 Registered: 2-2001 |
Dean, If it only pops at idle and not backfiring I would say that Brian makes a good point. At night in your garage with the lights off,garage door open, check the engine for spark jumps from your plug wires snd plug wire extenders down in the plug well. You should pull the boot up first on the wire to expose the extender so that you can see the spark down in the plug well. Good chance you will find your problem. If it is the extenders I would replace the whole set, about $8.00 ea.. | ||
| Brian stewart (Eurocardoc)
Junior Member Username: Eurocardoc Post Number: 178 Registered: 11-2001 |
Fuel in the exhaust. Used to be fun driving along the road flat stick, turn off the ignition then back on, BOOM, made the natives jump especially in a tunnel. Trouble is the mufflers flew apart too often. | ||
| BretM (Bretm)
Intermediate Member Username: Bretm Post Number: 1752 Registered: 2-2001 |
What exactly causes a backfire, or at least is the most common cause? | ||
| Brian stewart (Eurocardoc)
Junior Member Username: Eurocardoc Post Number: 174 Registered: 11-2001 |
Back to the plug extensions/wires/plugs. I am doing two cars as we write! | ||
| Dean Klaus (Gargoyle)
New member Username: Gargoyle Post Number: 5 Registered: 10-2001 |
Magoo, it back fires (a popping sound)when cold, while I am warming it up and when I am sitting at a light just idling it will pop a little and stop and then pop somemore. When I am driving down the road it does not back fire. When I take off from the light it feels like it does not have much power but then it kicks in as I give it more gas. I hope this helps and thanks for helping me out. Dean | ||
| magoo (Magoo)
Intermediate Member Username: Magoo Post Number: 2035 Registered: 2-2001 |
Dean, I hate to say it but there are many things that could affect it. Does it actually back fire or miss. If it backfires it probably is electrical. If it just misses it could be electrical fuel distribution and so on. Can you give us some more info.? Like on the rev, decelleration, more when cold then hot? | ||
| Dean Klaus (Gargoyle)
New member Username: Gargoyle Post Number: 4 Registered: 10-2001 |
I checked my exhaust system for a leak and did not find one. The way my exhaust pipes are, is they are split in two. One for one side of the motor and one for the other side. What could cause only half the motor to back fire at idle, if not an exhaust leak. Could it be a bad spark plug or plug wire? I am still trying to learn how to work on this car, so any suggestions would be great. Thanks Dean |