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  1. 2001 Bosch 4.6 fuel line

    Range Rover Mark II / P38
    Anybody know a source for the front fuel lines for a 2001 bosch 4.6? The molded 2 pipe rubber over plastic one that runs from the fuel filter/tank return up and over the transmission? I can't even find a picture of one. Mine apparently came unclipped from wherever it was clipped to and fell...
  2. Bosch MAF sensor

    Range Rover Mark II / P38
    I have been having some uneven running and lack of power issues. Checked my fault codes and after checking various posts on here concluded a good place to start was the MAF sensor. I was heading towards a Bosh genuine, again as a result of sage advice here, but was concerned at the cost. After...
  3. Bosch seats in GEMs

    Range Rover Mark II / P38
    I have an Alpine White 1996 that I've been working on for a winter vehicle. I've noted that the seats were not nearly as comfortable as my 2000 H+H. Looked and there is a Rhino edition in the junk yard near me with complete interior, any reason why I wouldn't be able to switch the seats and...
  4. Counterfeit Bosch MAF

    Range Rover Mark II / P38
    I have had my white 02 stored in the shed in Hawaii for the last 4 years. (warm and humid) Last November, I drove it quite a bit, but mostly 1/4 mile trips (moving stuff) When I then took it out on the road to town, I got SES light flashing. "Catalyst damaging misfire" according to the Nano...
  5. 2000 P38 4.6 BOSCH - Coolant Leaking

    Range Rover Mark II / P38
    Hey Everyone! New to this forum and hoping to get some help. I've had some recent overheating issues with my P38. When I purchased the vehicle I was able to drive it 70+ miles (highway) with no issues. It is mainly for driving around town and not really mean't to be a road trip vehicle...
  6. BOSCH coolant hose kit full specs custom shop

    Range Rover Mark II / P38
    Hello, forum I'm toying with the idea of taking the full specs i.e. (ID) and (OD) plus length and bends, to a custom hose shop in my city. Does anyone have the full specs of all the cooling system hoses? I just cant justify spending $320+ dollars on a kit from Atlantic British. If I have to I...
  7. Bosch 66156 Fuel Pump is Thor Fuel Pump Assembly WFX101390

    Range Rover Mark II / P38
    Hi all, As often as this subject comes up I wanted to let any North Americans looking for new fuel pumps that I found a local source: Bosch 66156 Fuel Pump on Amazon . The housing and wiring colors were identical to the OEM assembly that I removed, the fuel pump said BOSCH but I didn't note a...
  8. Bosch Fuel Injectors for AJ133 Engines - Set 4!

    New Parts
    Fuel Injector BOSCH 62120-Set 4 - $271.38 Use coupon code ForumFan5 at checkout and receive an additional 5% off any purchase at NewParts.com! Part # 62120 Interchange Part # LR069897, C2D45736, 0 261 500 298 / 0261500298
  9. 00 Bosch 4.0 misfire cylinders 3, 5 gets better when warm

    Range Rover Mark II / P38
    The truck sat for a over a year before I bought it. I replaced the BECM, ECU and instrument cluster and it started to run. I replaced the leaking heater core o-rings (the carpet on the right hand side was soaked). I replaced the spark plugs and did a compression check. a couple of cylinders...
  10. Are airboxes different on 4.0 vs 4.6 Bosch engines?

    Range Rover Mark II / P38
    I am buying a replacement airbox, I don't have the original airbox. The vendor seems to think that they are different 4.0 vs 4.6. Are MAFs different on 4.0 vs 4.6? What's the most reliable way to identify the engine? I am thinking transmission data plate (4hp22 for 4.0, 4hp24 for 4.6)?
  11. Bosch Coil Arcing

    Range Rover Classic
    This is a strange one. Last night I noticed a rough running condition on my 94 RRC. There would be a misfire every few seconds accompanied by a tick from under the hood. With the truck running I can see arcing and electrical energy flow from the +/- terminals on the coil to the coil...
  12. Bench programming Bosch Motronic 5.2.1 from P38a?

    Range Rover Mark II / P38
    Based on my research so far: P38 with Thor engine use Bosch Motronic 5.2.1 ECU. A very similar ECU is commonly found on various BMWs of the same vintage, E38 and E39 come to mind. The ECU uses DS2 serial protocol for diagnostics. The protocol is well known and documentation is available...
  13. 00 4.0 HSE Bosch - cranks but does not start

    Range Rover Mark II / P38
    New to me 4.0 HSE with Bosch engine. The truck sat for over a year. The battery is brand new, Deka 31P, 950 cold cranking amps, good stuff. Various contacts and ground connections cleaned, seem good. I replaced the fuse/relay box under the hood and the driver's door lock today with brand new...
  14. Nanocom vs Faultmate for Bosch P38?

    Diagnostic Equipment
    I did the search and some old threads seem to suggest that Nanocom was lacking come of the features of Faultmate. One such feature is ability to direct read BECM memory, which faultmate can do using SM035 and nanocom can not do. Since this feature requires BECM disassembly and soldering some...
  15. ongoing intermittent misfire

    Range Rover Mark II / P38
    Hi I've had this problem for quite a while now, ever since I replaced the head gaskets, but I've been busy with work and just not had the time to spend on it. I've finally 'given in' and let the local garage take a look and see what he can find out. He's come back to me and said he's put an...
  16. Bosch radiator in GEMS?

    Range Rover Mark II / P38
    In the process of switching out my radiator on my 98 p38 4.6 gems engine. I was at the junkyard and I came across a 99 RR 4.0 with the Bosch engine. I seen the radiator and thought WOOHOO found a radiator well I take it out and all get home about to rip my old rad out cuz as you can see it is...
  17. 02 4.6 Bosch Slow crank No Start No fuel

    Range Rover Mark II / P38
    This is my first post, so please forgive me if this is not in a correct section. This vehicle was sitting almost a year and did not crank when I got it. After cleaning the terminals and getting a new battery, it finally cranked but very slow and sluggish. 125 rpm at best. I checked spark and...
  18. All aluminum radiators still available for the Bosch 4.6?

    Range Rover Mark II / P38
    Good morning folks! Looks like it may be time to swap the radiator in the near future after a going-over in the engine bay this weekend. Had checked Scotty’s website as there were previous mentions of an all-aluminum upgrade available during a prior search on the forum here. Wasn’t able to...
  19. 2001 P38 Bosch with cold idle issues

    Range Rover Mark II / P38
    Hello there. Much Googling brings me constantly to this site, so I figured it was about time I joined! I have a problem with my P38 (4.6 Bosch). Upon start-up, the revs go crazy. They bounce around anywhere from 600 to 2.5k - clearly searching for a resting place. The cure to this is a quick...
  20. Put bosch wiring in a GEMS motor (v8)

    Range Rover Mark II / P38
    It is possible to put a bosch wiring on a Gems 4.6 motor.:| (cutting cables..etc)