| Author | Message | ||
     Carver Smith (Carversm) New Member Username: Carversm Post Number: 1 Registered: 02-2004 |
Status: New wires, injectors have been cleaned and balanced. Ignition system meters correctly. No rough idle. Only on a heavy load up hill in 4th OD after a 15 - 20 seconds can you start to feel the misfire. Let up on throttle and it will "go away". It takes a while but then it throws a code that cylinder 6 misfired and a 1316 code which is emissions. The mechanic has read about the sticking valves but he is not leaning that way. Only on a long load at maybe 60 to 75mph and this is at 5500 - 6500 feet altitude in "dry" Arizona. Any thoughts or things to try or.... Thanks Carver | ||
| Carver Smith (Carversm) New Member Username: Carversm Post Number: 2 Registered: 02-2004 |
New plugs of course too. | ||
| Robert Sublett (Rubisco98) Senior Member Username: Rubisco98 Post Number: 1141 Registered: 04-2002 |
You didn't put the fancy Bosch Platinum +4s in there did ya? I did and came up with the same results as you have with the misfires, though I didn't check the codes. | ||
| Danno (Danno) Senior Member Username: Danno Post Number: 345 Registered: 08-2002 |
i've had +4's for almost 6 years without a problem. | ||
| Carver Smith (Carversm) New Member Username: Carversm Post Number: 3 Registered: 02-2004 |
Just called the mechanic and he said HE steers away from the +4 just for the reason you said. Some engines it works and others they don't He has access to a ignition test from Snapon. He said we'll put it in and I go and make it fail. Of course that ignition pack from LR is over $600. We'll see if we can do something else. Any other suggestions, keep them coming. Carver | ||
| Geoff 93 RRC (Geoff) Member Username: Geoff Post Number: 229 Registered: 11-2002 |
Hmmm, check the valve problems section at http://www.robisonservice.com/servicedep/rover_advice1.asp. Go down till you see CarbonFouling#1... Other than that Lucas Fuel System Treatment at Pepboys or Autozone has done wonders for me. Run two bottles in back to back tanks. | ||
| Matt (Redpeak) New Member Username: Redpeak Post Number: 1 Registered: 01-2004 |
I've got a '96 Disco that is doing the exact same thing. I'm getting the same "cylinder 6 misfire code. I've run 2 cans of 44k through and replaced plugs and wires and still no change in the misfire. The new plugs are Bosch platinum2. The Disco feels the same, no better, no worse, misfire still there. The coil pack is a bit pricey to "try" to see if that is the problem. Assuming that is the problem, are there any other options with ignition system replacements like the Jacobs electronic ignition that Atlantic British sells? | ||
| Corey (Discobro) Senior Member Username: Discobro Post Number: 328 Registered: 12-2002 |
Guys - in my experience with tune ups in Discos it is very likely the misfires are due to the plugs. I too had Bosch plugs after my last tune up and misfires were happening and didn't before. I replaced the plugs with the stock Champion plugs and no misfires. This may be an isolated problem however (with more than one person with the same cylinder misfire that is). Just try the Champions and if it still misfires you know that isn't the problem. Go cheap and work your way to more $$$.  | ||
| Matt (Redpeak) New Member Username: Redpeak Post Number: 2 Registered: 01-2004 |
Corey- I had the Champions in there originally when I started having the problem. The new Bosch plugs and new plug wires were put on to see if there was a bad plug or wire. I didn't really notice any difference afterwards. The computer was reset and it still gave the cylinder 6 misfire reading. Hopefully the platinum plugs haven't compounded the problem. It really seems like the problem is elsewhere but I may go back to the original plugs just to eliminate a future problem. | ||
| Matt (Redpeak) New Member Username: Redpeak Post Number: 3 Registered: 01-2004 |
Carver- I guess the next thing to check (at least in the ignition system)is the coil pack since I've heard they sometimes go bad. I suppose I could switch a couple of coils and see if the misfire code changes cylinders or stays the same. At least I'd know if its in the individual coil. If anyone has any other suggestions I'd love to hear 'em. | ||
| Christopher G. Armanini (Vwer) New Member Username: Vwer Post Number: 1 Registered: 01-2004 |
Don't forget that the 5 and 7 cylinders fire simultaneously; thus, those two plug wires should cross-- check the Land Rover schematics-- lest a slight miss-firing might occur (although the Company doesn't say if it happens at high or low RPMs). | ||
| Matt (Redpeak) New Member Username: Redpeak Post Number: 4 Registered: 01-2004 |
Anyone have any other ideas? | ||
| Shawn McKenzie (Shawn) Member Username: Shawn Post Number: 194 Registered: 10-2002 |
Matt, I may have this problem with my '96 too. I talked to my LR parts mgr and asked if he could set the bad one aside the next time they replace a coil pack on another D1. He tells me two weeks later there is one on the shelf for me. Since the coils typically don't all fail at once there are three good ones for me to try out. YRMV (especially with dealers, but it's worth a shot and it's free) | ||
| Matt (Redpeak) New Member Username: Redpeak Post Number: 5 Registered: 01-2004 |
Shawn- That's cool your parts guy did that for you. Let me know what you find out, I'm curious to see if that's the problem. I'm guessing there should be some way to test the individual coils with a meter to find the bad one(s). If that solves the problem, and you don't have a use for the other coils save one for me. Thanks | ||
| Carver Smith (Carversm) New Member Username: Carversm Post Number: 4 Registered: 02-2004 |
Tuesday morning I went to the guy that services my D1 and then went for a ride with his Advantage display hooked to Plug wire 6. We had some misfires under long load. Did that twice but no check engine light. Moved it to wire 4. It did not misfire BUT we saw a complete dropout of firing voltage for a few milliseconds and the CE light came on. Mechanic had measured the primary resistance of each coil and they were a bit below what was listed, but that was on all of them. Owner of the business has a friend with a 96 D1 and will ask him if the next time he is in can we swap the coil pack to mine and try it. Carver |
