| Author | Message | ||
     Luis Constantin (Luisc) Member Username: Luisc Post Number: 57 Registered: 02-2003 |
Recently, my 98 D1 has been sluggish. I'm not getting the power that I have been out of it. Even the cruise control is effected. If I tap the cruise to accelerate, the speed actually drops. On hilled roads that I use frequently with the cruise on, my speed drops by up to 15mph, not the usual 3-5mph. I was wondering if it could be the MAF, throttle position sensor, ECU, or even the cruise itself. It's almost like I'm pulling a heavy trailer. Could it be the catalytic converter getting ready to stop up ? | ||
| Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 513 Registered: 04-2002 |
This happened to me. I was a trim 160 pounds, but after my wife left me, depression set in and my weight balooned up to 495 lbs in a matter of three months. I didn't realize this, so when my Disco started acting sluggish, I thought something was wrong. I then replaced the air-filter with a K&N and installed a Tornado, installed a PowerChip plus one of those $5 resistors you can find off E-Bay, replaced all the oils with synthetics, used a long oil-filter, then to top it all off, installed an electric turbocharger (also a really good buy of E-Bay). The power went from adequate to zero...nada, nothing. The oil from the K&N filter toasted my MAF, the Tornado broke into 30 tiny pieces, ran through the intake and scored up the combustion chambers, the sythetic oils all leaked passed the prehistoric Rover seals causing the EPA to tag my driveway as a Level 3 biohazard, the long oil filter voided my warranty, and I got my hand caught in the electric turbocharger which did nothing more than chip my fingernail. All in all, I wasted my money only to realize that the reason my Disco was so slow was because I had become a big fat bastard. You haven't gained any weight recently? | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 58 Registered: 02-2003 |
No, I haven't gained any weight, thank you. I was just hoping somebody had experienced this so I didn't have to run to the dealer again, only for them to tell me that it's all within LR specs. The dealer here does not seem to respect the idea that after several years of ownership, a person develops a feel for their particular cars character and personality. I had noticed things starting to change about a month ago, took the car in, and all they said was it is performing with in specs. Just because the "check engine" light is not on doesn't mean that there is nothing wrong. | ||
| Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 515 Registered: 04-2002 |
Well, how about a better answer.. quality of gasoline varies from time to time. Could very well be that the quality has decreased, and your GEMS ECU/ignition is retarding the ignition curve to deal with it...this could lead to a decrease in power. If you are not doing so already, run premium; if you are already doing so, try switching gas brands for a few weeks. | ||
| M. K. Watson (Lrover94) Senior Member Username: Lrover94 Post Number: 883 Registered: 02-2002 |
lol.....now that was funny! mike w oh yea, quality of gas is a good start. | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 59 Registered: 02-2003 |
Been getting my gas at the same place now for quite some time. I guess it's possible though that they've changed. Or some fuel truck driver put the low octane fuel in the high octane tanks. We all know that has never happened before. Just incase it's not the fuel, what would be your next guess ? | ||
| M. K. Watson (Lrover94) Senior Member Username: Lrover94 Post Number: 887 Registered: 02-2002 |
there are different fuel forumlas for different seasons. the octane was proberly not mixed up. mike w | ||
| Chris Browne (Chris_browne) Member Username: Chris_browne Post Number: 208 Registered: 02-2003 |
A/c does this. Hi altitude/heat doesn't help either. Anyone mess with the timing recently? | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 60 Registered: 02-2003 |
I'm not aware of anybody messing with the timing. I did just have my mandatory 82k service to maintain the extented warranty. I can check with the dealer tech on it. I did just come from another gas station. No difference after 20 miles. Now my car slows down so much on an incline with the cruise on that the cruise cuts off. | ||
| Chris Browne (Chris_browne) Member Username: Chris_browne Post Number: 209 Registered: 02-2003 |
Thats one sick sounding puppy... Does it run fine on flat local low speed roads? How about Interstates where you will have a wider throttle opening similar to hill climbing? | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 65 Registered: 02-2003 |
Runs fine on the level highway, until I come to an overpass. Had it on the highway from Houston to Austin the other day. It held a steady speed at 80mph all the way. It just seems like it takes all day to get there, especially if I use the cruise to accelerate. And to think, I'm getting ready to put one of those power chips in. Better wait till I find out what's wrong with the car first. | ||
| sean sinkule (Ssinkule) New Member Username: Ssinkule Post Number: 2 Registered: 07-2003 |
I am having the SAME issues with my 98 LSE with 43K on clock. Also wont downshift above 60mph. HELP | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 67 Registered: 02-2003 |
I've been going over my records and noticed an decrease in fuel mileage. Gone from 285 miles out of a tank to about 260. I wonder if there is any corralation to the poor performance. Time to pay the dealer a visit this week. I know what they're going to say. "Oh no! Here he comes again. Wonder what his problem is this time?" | ||
| M. K. Watson (Lrover94) Senior Member Username: Lrover94 Post Number: 892 Registered: 02-2002 |
dude, per chance you havn't changed your tire size? mike w | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 68 Registered: 02-2003 |
Nope. Same factory size, XPC 235/70-16. Even my mud tires are 235/70-16. And I run them at 32/36 psi f/r, above what LR has in the manual. | ||
| Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 516 Registered: 04-2002 |
Sean's post got me thinking...does your Disco downshift at all on those steep grades? If your transmission is not down-shifting automatically, then it may need to be serviced, check the torque-converter lock-up, or at the least, have the kick-down cable adjusted. Try driving the same hill and manually shifting the transmission into 3rd (I assume you are at highway speeds). If you can pull up it just fine, maybe it's the tyranny. | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 69 Registered: 02-2003 |
I'll have that checked as well. Might as well as long as it's under warranty. No point in getting my hands dirty. I was wondering if the detent cable for the transmission didn't have a little to do with it. But I have been climbing this same hill everyday for about 2 years and I've always had the power to maintain within 5 MPH without the car downshifting. I'm not going to rule it out though, but I think there may be a combination of problems that have popped up at the same time. | ||
| sean sinkule (Ssinkule) New Member Username: Ssinkule Post Number: 3 Registered: 07-2003 |
What symtoms should I look for in the torque converter lock up? Also, what is the typical highest speed you are getting kick down in? I understand that an enemic 4.0 pulling 6,000lbs is not going to be spirited but my 300tdi 110 will flat out run away from my Discovery | ||
| Terry Christmas (Cornfed3) New Member Username: Cornfed3 Post Number: 15 Registered: 06-2003 |
Just shooting in the dark here. Seems the problems occur while you are on an incline. Any chance the fuel filter is getting flooded or maybe the airflow is getting restricted causing lean/rich mixture failure. | ||
| sean sinkule (Ssinkule) New Member Username: Ssinkule Post Number: 4 Registered: 07-2003 |
I will check the Air Filter, I dont think it is a fuel flow issue, last weekend I pulled a full trailer with a 88" SIII on it and it was very smooth, but the same lack of downshift. Had the kick down checked last week Road Britannia said it was fine. How do I check Torque Converter? Thanks | ||
| Chris Browne (Chris_browne) Member Username: Chris_browne Post Number: 211 Registered: 02-2003 |
Torque converter locks at 52mph +/- and at that point revs drop a little. Lets go with the cheap stuff....have you checked and regapped the spark plugs? How old are the dizzy cap, wires and rotor.... | ||
| Parrish R. Blackmon (Discoveryfl) Member Username: Discoveryfl Post Number: 80 Registered: 10-2002 |
Check the speed sensor. I had the same problem with shifting above 60 mph. My Discovery actually would not shift into overdrive. It was also stumbling a lot. I replaced the speed sensor and, knock on wood, everything seems fine. Sluggishness may also be caused by bad O2 sensors, which would make the engine run rich. Just some thoughts. | ||
| Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 519 Registered: 04-2002 |
Sean, like Chris mentioned, around 50-52 mph. Sometimes earlier. It will almost feel like your tyranny is shifting into a "phantom" 5th gear... | ||
| Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 520 Registered: 04-2002 |
Fuel filter becoming flooded? Eh? Fuel injected cars require a pressurized fuel system; as little as 15 psi for some throttle-body injected EFI systems to 60 psi or more for port fuel injection systems. Since the fuel filter is in-line between the fuel-pump and the fuel-rail (where the fuel pressure regulator is located), you had better hope it is full to the brim with fuel... | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 71 Registered: 02-2003 |
OK.....We looked at it today, just briefly. We found two split vaccuum lines, one leading to, you guessed it, the cruise control. I'll fix that and if that doesn't take care of it, then it is something else. I'll keep you all updated. | ||
| Jim H. (Victor_mature) Member Username: Victor_mature Post Number: 122 Registered: 02-2003 |
Vacuum line? Geez, I thought for sure that it was the gasoline, timing, altitude, somebody put different tires on your truck, torque converter lockup, kick-down, "flooded fuel filter"(???), distributor cap, rotor, plug wires, speed sensor, O2 sensor, maybe you just gained weight type of problem. Hmm. | ||
| Land Rover Certified Used A**hole (Jason) Senior Member Username: Jason Post Number: 523 Registered: 04-2002 |
That's the great thing about internet diagnostics...BTW Jim, you're going to have a heart attack next week. | ||
| Luis Constantin (Luisc) Member Username: Luisc Post Number: 84 Registered: 02-2003 |
Problem solved. It was the vaccuum hose to the cruise. |
