Engine sputtering chugging between 2650-3200 rpm - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old February 17th, 2004, 01:48 AM
Heath's Avatar
Heath
Status: Offline
Heath Ahrens
1995/D-90
Member
 
Join Date: Feb 2004
Location: Bernardsville, NJ, US
Posts: 125
Engine sputtering chugging between 2650-3200 rpm

1995 D-90 Symptoms:
Engine sputtering + chugging between 2650-3200 rpm
(in gear and neutral)
(seems to get worse with more electronics (heater fan, lights, wipers....etc)

I have seen quite a few posts on this board about similar issues...

So far I have tested the following
ECU (no codes -- hmm flashes 88 real fast when reseting)
Throttle Position Sensor (seemed real smooth from 0-5 ohms)
Battery has a healthy charge and does not fluctuate when engine is reved (same with alternator -- though that may mean nothing)
All plugs seem to be sparking
I doubt coil, wires... because it is between 2650 and 3200 rpms.
It is not speed related.

Could be:
distributor, ecu, crankshaft sensor, voltage regulator/alternator
I don't know how to properly test this stuff.

Any help would be greatly appreciated.
You tell me and I'll test it.
Thanks in advance...
-H
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old February 17th, 2004, 10:17 AM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
D-90Slut/Stalker,SNLPres
94 D-90 Grinding Rover
Member
 
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,789
Heath, you can get the alt, diodes, and battery tested at most local autoparts store for free (autozone always helps me out).

But, I think your problem may be something else, electronic devices cause EMI (electro magnetic interferance) and EMI from one thing can cause another thing to not work properly. Example: While you are watching TV someone starts to vaccume (your mom or your wife) when she gets close to the TV you see static on the screen this is caused by EMI from the vaccume.

So your problem may be due to noise being generated by the alt and getting onto the ignitoin lines.
__________________
Don't forget to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
first then ask questions later! The loose nut behind the wheel
Reply With Quote
  #3  
Old February 17th, 2004, 10:29 AM
Davis's Avatar
Davis
Status: Offline
Chris Davis
94 NAS D90 6.2LS
Member
 
Join Date: Nov 2003
Location: Colorado
Posts: 2,503
I had similar problem at similar RPM and it was the alternator. One of the ziener diodes was leaking AC current into the system at that rpm. Had it fixed, all symtoms went away. Should be easy to at least have checked out.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old February 17th, 2004, 11:51 AM
vesparover's Avatar
vesparover
Status: Offline
brian bertolini
Member
 
Join Date: Sep 2003
Location: charleston, sc
Posts: 152
i had that problem too, replaced the alternator + ground wire+ ran a straight wire from alternator to battery. No more problems
brian bertolini
Reply With Quote
  #5  
Old February 17th, 2004, 08:49 PM
wicks's Avatar
wicks
Status: Offline
Wicks
97 Defender LE SW #44
Member
 
Join Date: Oct 2003
Location: Hollywood, CA
Posts: 806
DW this may be your issue as well. ?
__________________
Wicks | 1st pl Nevada Trophy 2004 & 2003
Currently no Land Rover - hunting for the perfect white SIIA
2015 G550, 73 911s, 06 BMW GSA, 06 Ducati Paul Smart, 73 Moto Guzzi V7sport
Reply With Quote
  #6  
Old February 17th, 2004, 10:28 PM
Doug's Avatar
Doug
Status: Offline
Doug Walker
TVR5L-powered NAS D-110
Member
 
Join Date: Oct 2003
Location: Los Angeles, CA, USA
Posts: 880
I had a 20 minute talk with RPI this morning. They agree with Mike Green's diagnosis -- flat camshaft. But also cautioned that a faulty distributor or diodes, plug wires, etc. could be the cause. Since I've been through that last bit, I'm thinking cam. RPI said that ECUs almost never fail. It's the last thing to suspect. Also the compression in the v8 is usually not the case either. So, regarding Heath's issue above, I'd go into the ignition/spark path and look for the problem there first. A good computer test from a shop with proper LR diagnostic equipment will help a lot.

Doug
Reply With Quote
  #7  
Old February 17th, 2004, 11:45 PM
wicks's Avatar
wicks
Status: Offline
Wicks
97 Defender LE SW #44
Member
 
Join Date: Oct 2003
Location: Hollywood, CA
Posts: 806
So what r u going to do about that cam shaft? Get out the x-ray goggles and make sure it's flat I guess before doing anything...
__________________
Wicks | 1st pl Nevada Trophy 2004 & 2003
Currently no Land Rover - hunting for the perfect white SIIA
2015 G550, 73 911s, 06 BMW GSA, 06 Ducati Paul Smart, 73 Moto Guzzi V7sport
Reply With Quote
  #8  
Old February 18th, 2004, 01:40 AM
Heath's Avatar
Heath
Status: Offline
Heath Ahrens
1995/D-90
Member
 
Join Date: Feb 2004
Location: Bernardsville, NJ, US
Posts: 125
Well, I am going to go and get the alternator checked (hopefully tomorrow). Another thing about this problem... It happened instantly, not gradually; I would think a camshaft getting worn down would happen over a long period of time.
I will let everyone know what happens.
Reply With Quote
  #9  
Old February 18th, 2004, 02:30 PM
Doug's Avatar
Doug
Status: Offline
Doug Walker
TVR5L-powered NAS D-110
Member
 
Join Date: Oct 2003
Location: Los Angeles, CA, USA
Posts: 880
Wicks,

It's more than I have time to worry about at this point. At sea level, it's really not a bother. 4,000 or 5,000 feet and it gets annoying. But there's no harm in driving it, so I'm told.

DW
Reply With Quote
  #10  
Old February 19th, 2004, 12:41 AM
Heath's Avatar
Heath
Status: Offline
Heath Ahrens
1995/D-90
Member
 
Join Date: Feb 2004
Location: Bernardsville, NJ, US
Posts: 125
I had the alternator tested today at Autozone (for free). The machine said bad diode. They have a replacement alternator there Duralast . (bad link)
DURALAST-IMPORT ALTERNATOR for a 1995 LAND ROVER DEFENDER 90
Unit Price: $189.99
Core Value*: $95.00
Part No.: 14361
Weight: 11.0 lbs.
Warranty: LLT
Does anyone have any suggestions for a replacement alternator? My local rebuild shop doesn't want to mess with the M.M. Alternator.
Thanks again for all the help.
Reply With Quote
  #11  
Old February 19th, 2004, 01:10 AM
Davis's Avatar
Davis
Status: Offline
Chris Davis
94 NAS D90 6.2LS
Member
 
Join Date: Nov 2003
Location: Colorado
Posts: 2,503
I had my alternator rebuilt by Simcor in Boulder. He is a class act. He was recommended by the same person (Charlie) that knew what was wrong with my alternator--I HIGHLY recommend him--I visited his shop and can atest first hand to his skill and competence.
Reply With Quote
  #12  
Old February 19th, 2004, 08:47 AM
vesparover's Avatar
vesparover
Status: Offline
brian bertolini
Member
 
Join Date: Sep 2003
Location: charleston, sc
Posts: 152
Don't buy those pos alternators from autozone or advance. They are garbage. I put a 130 amp disco 2 alternator on mine, brand new on ebay for $120! I hear mean green makes a good one too.
good luck
brian bertolini
Reply With Quote
  #13  
Old February 20th, 2004, 11:12 AM
Heath's Avatar
Heath
Status: Offline
Heath Ahrens
1995/D-90
Member
 
Join Date: Feb 2004
Location: Bernardsville, NJ, US
Posts: 125
How do you use a Disco I or II alternator? Is the pulley on the front the same as the D-90? Can you switch the pulley? Can someone let me know how they fit? Or if other rover years will work? Thanks again.
Reply With Quote
  #14  
Old February 7th, 2005, 06:33 PM
Rover 33
Status: Offline
Tom Paisley
Member
 
Join Date: Oct 2004
Location: Denver, CO USA
Posts: 2
It's probably the alternator. They can emit an Electromagnetic field that can interrupt the ignition signal causing loss of spark. Just pull the drive belt off for a quick check. If the miss is eliminated with the alterator not turning that's the problem.
Reply With Quote
  #15  
Old February 8th, 2005, 08:36 AM
vesparover's Avatar
vesparover
Status: Offline
brian bertolini
Member
 
Join Date: Sep 2003
Location: charleston, sc
Posts: 152
Dale wennegal sold me a bracket to fit the disco 2 alternator. Give him a try.
brian bertolini
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
engine

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
300 Tdi Egt Q?????? Buckon37s Defender Technical Discussions 37 July 11th, 2012 11:26 AM
Engine Proble: Please Advise saber6 Defender Technical Discussions 24 November 6th, 2009 10:06 AM
service engine VS. check engine scubadanster Defender Technical Discussions 18 June 23rd, 2009 11:18 AM
Oil Info XD90 Defender Technical Discussions 5 September 7th, 2004 10:07 PM
???still can't get the trany unbolted from the engine???? kit Defender Technical Discussions 4 October 23rd, 2003 03:20 PM


All times are GMT -5. The time now is 08:31 AM.


Copyright