| Author | Message | ||
     ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 101 Registered: 06-2002 |
95 D1 my Disco has been misbehaving... symptoms: rig idles fine and for the most part runs okay... but if you press the gas and the transmition kicks down and the rpm's go around 4k RPM the truck seems to loose power. recently i have: drained and replaced the transmition fluid added lucas transmition fluid stuff replaced: spark plugs, spark plug wires (8mm), cap and rotor... but i still get the same damn thing. lighty press the accelerator and the rig will go. but stomp on the gas, the transmition kicks down and you actually slow down... FRUSTRATING... is my transmition slipping or is my ignition the problem or is it some other F'ing thing.... | ||
| James Moy (Jmoy97) Member Username: Jmoy97 Post Number: 50 Registered: 02-2003 |
might be the VSS vehicle speed sensor. Jim | ||
| Donald M (Discodon) New Member Username: Discodon Post Number: 14 Registered: 08-2003 |
that's gotta be a fueling issue......no? | ||
| ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 102 Registered: 06-2002 |
one more thing... it feels like my rig has no power past 3500-40000rpm... i.e. if i softly accelerate and the rpms never go over 3500-4000rpm i'm okay... i can go 80mph but if i floor it and the transmition down shifts to over 3500rpm... it just revs really high... this is at any speed. i.e. punch it going 30mph... or punch it at 70 | ||
| Chris Browne (Chris_browne) Senior Member Username: Chris_browne Post Number: 347 Registered: 02-2003 |
Fuel pump getting weak and cannot supply sufficient fuel to allow engine to run at hi speed. But I'd start by replacing the fuel filter just in case its clogged | ||
| David Marchand (Dmarchand) Member Username: Dmarchand Post Number: 206 Registered: 09-2002 |
Check your fuel pressure. Change the fuel filter, and consider swapping in a new throttle position sensor. It is NOT the VSS. If this fails, then your probably looking at a trans rebuild... Ask me how I know...hehe. Chris B., what's your truck doing at the shop? | ||
| ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 104 Registered: 06-2002 |
Okay, thx for the advice... the fuel filter is the one thing that i havent replaced yet. i think i've seen some post in the past that this is a b!tch. something about removeing the old one can be hard i think? does anyone have any advice on the "best way" to do this??? special tools, two man vs one man job, special thread sealers, processes???? i have a new filter ready to go | ||
| JVelocet (Vracer) New Member Username: Vracer Post Number: 37 Registered: 06-2003 |
Also check the Vac advance unit on the distrubutor I just replaced mine (95 D1) and you will see the difference right away. They don't last as long as you'd think. Without proper advance your engine will feel flat in the range you are speaking about. No special tools on the fuel filter replacement, but be ready for a little fuel to leak out when you remove the filter. | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 235 Registered: 04-2003 |
I see everyone making suggestions, but I have one quick question.....or statement. If when you accelerate quickly and it keeps reving but you are not moving very well. You have a Transmission problem Find a good Transmission mechanic. If when you accelerate and you go over a certian rpm and it the rpms drop at the same time you slow down, then it may be a fuel issue or a VSS issue. Just my .02 worth | ||
| ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 105 Registered: 06-2002 |
i was thinking/hoping that it was some other issue then the transmition... how does one test the vacume advance??? i was kind of thinking it was an ignition problem as well (thus i chg'd the "HT leads", cap, rotor and plugs) more clues... in the last few weeks i've had the check eng light come with a code that points to right bank mis fire... thats why i changed the cap, rotor, wires and plugs... havent seen it since i put in the new plug, wires, cap and rotor... but i still have the "cant accelerate past 4K rpm problem"... in addition, i have a new fuel filter that i will be putting on the next few days. anything else i should change? | ||
| Donald M (Discodon) New Member Username: Discodon Post Number: 17 Registered: 08-2003 |
the rigs ECU is not in that 'get home mode' is it? This is a guess as I know nothing about it. | ||
| JVelocet (Vracer) New Member Username: Vracer Post Number: 38 Registered: 06-2003 |
Best way is to pull the cap, if you can see thru the cover over the plates good, if not try to listen to see if you can hear the plates moving, put a little vaccum on the unit (take the other end of the hose off the plenum and apply a little suction) you should see the plates that advance the timing move. If there is no resistance, or the plates do not move when you apply vaccum the unit is bad. | ||
| ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 106 Registered: 06-2002 |
What the heck is: "the rigs ECU is not in that 'get home mode' is it" how does ones ECU get in 'get home mode' and how does one fix it??? as for the vaccum adv... how much did it cost to fix it/can i do it my self??? | ||
| Donald M (Discodon) New Member Username: Discodon Post Number: 18 Registered: 08-2003 |
'get home mode'. I'm led to believe that if the ECU senses something not quite right then it lapses into a 'safe mode' where certain driving conditions are not permitted (i.e, high revs, 'flooring it' etc etc). Someone confirm this?? | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 239 Registered: 04-2003 |
Ken I noticed you say that you can not accelerate past 4k RPM. Does it not let the engine go past 4k or will the Trans just not accelerate past 4k? A little more info.....sorry but it could be alot of differnt things, with a little more I might be able to spark the old noggin into working better. | ||
| ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 107 Registered: 06-2002 |
hey Joey what happens is: if i am light on the accelerator pedal, the transimition shifts normally as long as it doesnt pass 3800-4000 rpm. and i can achieve speeds of 70+ but if i press the accelerator hard and the transmition kicks down and the engine revs up to 3800-4000 rpm the transmition wont shift up AND the engine actually looses power/doesnt go above 4K rpm... i.e. if im going 70mph the speedo will slowly go down... like wise if i punch it off the line... i get to about 30-35 mph... then nothing more i used to have a Toyota MR2 which had a 6800rpm rev limiter and this feels the same... does this help/make sense??? could it be the vaccum thing or maybe my alternator????? | ||
| JVelocet (Vracer) New Member Username: Vracer Post Number: 39 Registered: 06-2003 |
You can fix the vac. advance yourself. You can find the part on line from any of the Land Rover parts suppliers I think I paid around $125.00. You'll need a torqs driver or socket to remove the small screws that hold the unit to the distrubutor. Make sure to keep the seal between the unit and the distributor and put some locktite on the screws when you put them back they have a tendency to come backout. Also make sure you capture the pin on the plates when you install the new unit (it's the same test I mentioned before) | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 243 Registered: 04-2003 |
Sounds like you may have the beginnings of a bad CAT. Take it to you local muffler shop and have them pressure test it. | ||
| ken nishikawa (Scubaman99) Member Username: Scubaman99 Post Number: 108 Registered: 06-2002 |
thanks! ill try the suction test after work tonight. |
