| Author | Message | ||
     Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 131 Registered: 05-2003 |
GOOOOD LORD! after nearly selling my soul to pual(no hard feelings).. i must say that the Napa(non-lr) IAC is not working very well in my 95 d1. does anyone know where to find a good IAC that my disco AND my wallet will like? has anyone else had this problem? talk to me!  OOOHHH! my o2 sensors cam in today!!!! [razzersaserfrazin-jerks!]stupid carparts.com shipped me the wrong ones! the SG63 and 36 are too big for the 95 d1.  so i went to the o2 site and got a good deal with better specs. $119 for 2.! | ||
| JVelocet (Vracer) New Member Username: Vracer Post Number: 5 Registered: 06-2003 |
Is you idle still irratic? I just installed the napa motor, it idles low (600 rpm) but it is steady and smooth. | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1703 Registered: 02-2002 |
Raf: Some say the NAPAs don't work. I have a bunch of happy clients with them in their trucks. Did you clean the ports real well? I'm still waiting for your soul to be delivered-I'll let you borrow it when you leave for Mexico! | ||
| Rob Davison (Pokerob) Senior Member Username: Pokerob Post Number: 1759 Registered: 02-2002 |
damn-it paul i told you the disco's dont like the non-genuine steppers, but you keep pretending they do just hasn't happened to you yet! this is probably the tenth example i've seen. | ||
| Jared Schnelle (Jared) Member Username: Jared Post Number: 135 Registered: 09-2002 |
Rob, I have a NAPA stepper and it works great. By the way I have a 95 with 153k | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1705 Registered: 02-2002 |
Take that Rob! (Insert smilie here) | ||
| Rob Davison (Nosivad_bor) Senior Member Username: Nosivad_bor Post Number: 542 Registered: 02-2003 |
yunz told me. | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 143 Registered: 05-2003 |
CRAP!!! i just RE-FOUND this posting i started... i started anotherone b/c i thought ho hand deleted it. ok.. pual, here is what happened.. my parts have not come in yet. but i am 100% sure that it is the o2 and the iac, because when i reset my codes the truck runs fine.. and then when i sit a a light for more than 67 seconds (i counted ), the engine light comes on, and the idle becomes rough. but as long as i am in motion, the light will stay off. i had it off for 1/2 a day, and it just came on today with the same 3 codes. (i am pretty much at peace about the repairs needed, i just need to find a borg warner or ac delco stepper.) as for rob.. just pretend he's the kid with ADHD and ignore him! | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1707 Registered: 02-2002 |
Rob: I met a gentleman on Satuday who got two bad IACs from the Land Rover dealer, back to back... Apparently, the same supplier must manufacture the IAC valves for Land Rover as well as NAPA. Peace, Paul | ||
| Rob Davison (Nosivad_bor) Senior Member Username: Nosivad_bor Post Number: 557 Registered: 02-2003 |
LOL ~ admit it already!!! NAPA uses the rejects from Land Rover | ||
| Aaron Richardet (Draaronr) Member Username: Draaronr Post Number: 159 Registered: 09-2002 |
I tried the napa also and it didn't work. Now my 150 IAC has become two for $180. Go genuine and be done with it. | ||
| Rob Davison (Nosivad_bor) Senior Member Username: Nosivad_bor Post Number: 560 Registered: 02-2003 |
my experience and collective theory: the ones you are getting from napa do not have the identical range that the genuine one has. the Genuine one, in my experience can go in and out say .5" of travel the aftermrket ones that are for the sunbird and other GM cars have a travel of .4" and if your base idle is at the high end or low end you are not goign to get optimum performance from the aftermarket ones. rovers leaving the factory as we know have some varience between them. if you have one where the stepper motor is set in the middle, so to speak, you are going to be able to use the aftermarket. if you are set at the low or high end, only the genuine one will work. most range rovers seem to accept the aftermarket stepper fine, maybe they are built to tighter tolerances in this respect. i dont know but i somehow doubt one in twenty units is bad. | ||
| Joseph Bilyk (Denverrover) Member Username: Denverrover Post Number: 71 Registered: 02-2003 |
Shouldn't the ECU compensate & change the position of the IAC once it is installed in the motor? I know for example that when you install an IAC you are supposed to drive over 40 mph. | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1709 Registered: 02-2002 |
I wonder if it wouldn't be wise to reset the base idle every time we swap IAC valves to ensure that the range of adjustment is within an acceptable limit. Rob: How did you setup an experiment to measure range of adjustment? 12 volts to each winding? I have a handful of take-offs and a few new ones. I'd like to see just how far they can each travel. Peace, Paul | ||
| Joseph Bilyk (Denverrover) Member Username: Denverrover Post Number: 72 Registered: 02-2003 |
Paul - I have a 1996, would it be possible for me to set the base idle without an autologic?? -Joe | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1713 Registered: 02-2002 |
Joe: I'll have to check my manuals, but I believe that this is one of the few things that we can do ourselves. As I think about it more, I believe we can as the major diffeence with the GEMS engine was enhanced control of ignition. | ||
| Joseph Bilyk (Denverrover) Member Username: Denverrover Post Number: 73 Registered: 02-2003 |
Paul that would be much appreciated. This is something that I would be very interested in. I replaced my IAC on my 96 a while back & the base idle really needs to be set up........ - Joe | ||
| Rob Davison (Nosivad_bor) Senior Member Username: Nosivad_bor Post Number: 563 Registered: 02-2003 |
paul i just screewed it in and noticed it wasnt sticking out as far. my .4" guess is not 100% but i am sure that it doesnt go in as far. because i screwed mine in all the way (like the directions say) and compared the two. i think what you might fail to realize is I dont run the "genuine" one" heehehe mine works but they always seem to on the range rovers | ||
| Joseph Bilyk (Denverrover) Member Username: Denverrover Post Number: 75 Registered: 02-2003 |
Wait..Wait there are directions here for replacing the IAC??? Oh crap no wonder mine doesn't work right!! So you are supposed to screw it all the way in before you install it. Can someone pls shed some light on this!!! | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1722 Registered: 02-2002 |
Rob: The one I put on my Disco seems to work fine, no stalling at stoplights and when I turn the A/C on. I feel strongly that my hard starting is due to either a poor check valve in the fuel pump ('94 Mazda), or perhaps a bad injector which will really upset me as I just had them cleaned! With respect to the IAC valve, I wonder how much motion is required. To a great extent, I would expect it to only need to move a very slight amount to achieve a fairly dramatic change in air flow. I see another part on the horizon, perhaps an externally adjustable IAC with a thumbscrew to allow me to turn it to see how much travel is required for a given change in idle speed. Time to fire up the lathe. Peace, Paul | ||
| Rob Davison (Pokerob) Senior Member Username: Pokerob Post Number: 1767 Registered: 02-2002 |
yeah, paul i dont "know" any of this it's jus ta running theory of mine thats why i dont really advise it, i realize it's so cheap that in most opinion you cant go wrong, but i keep thinking that they are effecting futer results. as for the directions, mine said to twist it all the way in because it can bottom out againts something inside where it screws. ayway. withit all the way in it will self adjust out until it satisfies itself. rd | ||
| Shaun Power (Shaunp) Member Username: Shaunp Post Number: 58 Registered: 05-2003 |
Guys what is different about US cars compared to OZ cars. Why are you guys always changing steppers. The only one I have changed is the one I dropped and broke, when I rang M.R. Automotive and Jag and rover spares they both said why would you want one of those we have never sold one. Murray at Jag and Rover gave me one from one of his 2nd hand engines and said keep it. I just clean them with carby cleaner and then spray WD40 inside them at every service. Make sure you hold them with the valve end down spray up inside them and all the crap runns out. I find that the base idle is almost always wrong, I guess it changes as the engine ages. Incorrect base idle will cause the stalling problem, I have never had to adjust the base idle down only up. Fast idle is normally caused by temp sensor of stuck open thermostat I find. | ||
| Joseph Bilyk (Denverrover) Member Username: Denverrover Post Number: 76 Registered: 02-2003 |
Any info on how to set the base idle?? Anyone?? Joe | ||
| Rob Davison (Nosivad_bor) Senior Member Username: Nosivad_bor Post Number: 565 Registered: 02-2003 |
I Would not F withthe base idle ,thats my point. that should stay where it's at and The stepper should work around that. I have only replaced one. shaun, the point is for $26USD you can have this generic stepper so why clean it? but are we trading any performance for the price. i think the potential is there. rd | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1723 Registered: 02-2002 |
The necessity for changing the base idle is directly related to the number of miles on a vehicle and the associated wear in the throttle assembly. As the vehicle begins to age, these clearances can and do change from wear and buildup of crud. It is also indicated in the event the upper plenum has been removed. Some of the parts houses will immediately point you in this direction, along with checking air gap. In the vast majroity of cases with high mileage trucks and spotty maintenance, a thorough cleaning of the throat of the intake plenum can be very beneficial. I have seen some trucks (mainly Rangies) benfit VERY greatly from removing this crud so the throttle butterfly can return to its correct position repeatably. As for replacing the IAC valve, I consider the modest cost to far outweight he risk of a truck coming back to me for an IAC related problem. In my personal truck, I cleaned the IAC every several thousand miles and finally, the seat of the valve began to show significant grooving and I replaced it. My concern now is that the casting into which it mates may have some wear and is no longer sealing effectively, nor repeatably. Were I to pay or charge the Land Rover price for this part, I am not certain I'd be able to sleep at night! Peace, Paul | ||
| Love Jones (The_tool_man) New Member Username: The_tool_man Post Number: 1 Registered: 06-2003 |
hello brother paul, i have a new LR stepper put in this morning, and i still trip a code. it revs to 2000rpm, and then trips the code. i have heard yall know about these things. any input? | ||
| Jim H. (Victor_mature) Member Username: Victor_mature Post Number: 101 Registered: 02-2003 |
I've been trying to figure out a high idle (when starting hot) for awhile now, seems like quite a few of us are having the same problem. I cleaned the IAC and the crud from around the plenum butterfly, helped for awhile then about a week later the high idle was back; just like The Tool Man, my idle shoots up to almost 2000, hangs for awhile and eventually settles back down. I even took it to the dealer who adjusted the IAC - (he told me it's done by adjusting the allen screw under a cap near the plenum inlet) but the problem is still there. QUESTION: Does the the auxilliary fan switch, located on the thermostat housing, feed data to the ECU to control fuel delivery, causing it to deliver too much fuel? Because my fans seem to be coming on and off on their own schedule, (this is with AC off) while the temp gauge reads normal. | ||
| Greg Hirst (Gregh) Member Username: Gregh Post Number: 233 Registered: 10-2002 |
JimH- Did you clean the outside throttle mechanism too? Sometimes crap hangs up the closer springs on the outside throttle mech as well and needs a shot of carb cleaner. Just don't try to "lube" them with anything other than carb cleaner or you may attract more dirt and compound your probs. My 2 cents | ||
| Tony Zuniga (Tony23007) Member Username: Tony23007 Post Number: 120 Registered: 05-2003 |
Ok, I've look on the archives but I can't seem to find a part number for the Stepper Motor, I contacted NAPA and they told me they did not have it and could not order it but there are several posts here that state otherwise, can someone please post the part number for an aftermarket Stepper Motor, I am planning on testing my Disco out this weekend but don't want to go and buy the deales $200.00 part!!! For those having hight idle problems, my mechanic found out I had three bad fuel injectors, the leaks produced by the bad injectors caused my idle to go througth the roof then after the fuel burned away the idle climbed back down to normal.. Just my input on that issue. Also, if I can't get an aftermarket IAC then I plan to take mine out and clean it out really well with Carb cleaner and such, does the unit go right back in the way I took it out or do I have to wind it all the way back like it is a new one? Thanks for the info in advance. | ||
| Steve Cooper (Scrover) Senior Member Username: Scrover Post Number: 371 Registered: 09-2002 |
"I even took it to the dealer who adjusted the IAC - (he told me it's done by adjusting the allen screw under a cap near the plenum inlet) but the problem is still there." That's the base idle. It may need to be adjusted when you install a new stepper - mine did. BTW I bought my stepper from Autozone, it's a Wells AC102 - about $33 I think. Cured all my stalling issues - just had to up the base idle a tad. Steve | ||
| Shaun Power (Shaunp) Member Username: Shaunp Post Number: 62 Registered: 05-2003 |
Tony you don't have to adjust the unit it self. Just clean it well, you will see a groove under the spring make sure it clean, clean the plenum chamber as well . Set your base idle and see how it goes. I find they are always out of range on trucks that have done a few miles. | ||
| Love Jones (The_tool_man) New Member Username: The_tool_man Post Number: 12 Registered: 06-2003 |
will setting the base idle stop the surging to 2000rpms as well? also, have you checked your stepper housing? some housings were made wrong by LR. | ||
| Shaun Power (Shaunp) Member Username: Shaunp Post Number: 71 Registered: 05-2003 |
Only if it's set wrong . Have found sometimes the connectors on the air flow meter get dirty and cause surging. |
