| Author | Message | ||
     Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 1 Registered: 02-2004 |
Hi all, I am the proud new owner of my first rover. It is a Disco SE7 with 55000 miles. The problem I am haveing is that the truck idles very rough and stalls quite often when I am stopped at a light or whatever. I also believe the truck is running very rich from the smell of the exhaust. I have checked the alternator and battery both look fine. If anybody has any ideas I would appreciate it. Thanks. | ||
| Matt Anderson (Disco01) Senior Member Username: Disco01 Post Number: 252 Registered: 10-2003 |
I would take a spark plug out and check it. You will be able to tell how the engine is running by the plug. Post a pic if you want and we can tell ya if you are running rich. Any check engine light? Could be your o2 sensor. Any rattling from the underbody when you are idling and warmed up? Truthfully, you may need to take it to a shop that has the diagnostics. | ||
| Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 2 Registered: 02-2004 |
Check engine light is on. I thought that was because it didn't have its 50k service. There does seem to be some rattling or clicking when idling and warm. I might take it down to autozone to have the codes checked. | ||
| michael a. kerr (Ethanrover98) Member Username: Ethanrover98 Post Number: 46 Registered: 11-2003 |
Paul, Having the codes read is key!!!! As a matter of fact you are better off to just bite the bullet and buy a OBDII code reader (about $130-$150) so that you will have it for future troubleshooting...... Also, try the search feature on this site........ it is a great resource......... | ||
| Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 3 Registered: 02-2004 |
Yeah, I will eventually get the code reader but the wife would probably kill if I bought right now. I did use the search feature, it gave me some ideas but nothing specific. I was just talking with a mechanic who said it might the idle bypass valve. Any ideas on how I check that? | ||
| Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 4 Registered: 02-2004 |
Ok, Autozone can't read the Disco. I guess I could by the tester. I guess it is a standard OBDII tester. Where is the computer located and is there a list of codes on the site. I hope I am not being annoying. I have learned a lot from these types of sites for my other vehicles. Thanks. | ||
| michael a. kerr (Ethanrover98) Member Username: Ethanrover98 Post Number: 47 Registered: 11-2003 |
Paul, The plug for the computer is below the steering wheel (inside the vehicle) about in line with your right knee. The idle bypass valve is also called the stepper motor and could very well need to be cleaned or replaced (once again there are a million references to cleaning and/or changing this..... do a search for "stepper motor"). For the code reader and code descripitions do a search for "OBDII code reader". It's all in there..... Good luck and don't worry about annoying anyone........ Is this vehicle your daily driver? Is this an emergency? If so and you are in a real bind just say so and the resident site experts will jump in and help you. | ||
| michael a. kerr (Ethanrover98) Member Username: Ethanrover98 Post Number: 48 Registered: 11-2003 |
Paul, Did you check the spark plug as Matt suggested? That would be a great starting point while you are trying to have the codes read......... | ||
| Matt Anderson (Disco01) Senior Member Username: Disco01 Post Number: 253 Registered: 10-2003 |
I think his converter is shot. He is hearing rattling at idle and when the converter breaks up it will clog the pipes causing the stalling. Not to worry, these are warranted for like 8 years. I would bet the farm on the converters. (I dont have a farm so that is a safe bet for me) | ||
| Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 5 Registered: 02-2004 |
Ok, again thanks for the help. This is a tremendous response. Yes this is a dail driver but I should be able to get along for the next couple of days. The good news is I was able to get Autozone to down load my codes. I think they all basically lead back to the MAF. I will post them so you guys can tell me what think. The first one is P0101 "there is a discrepancy between the actual MAF input and the calculate MAF input. The next is very similar to the last P0103 "PCM has determined the MAF input is higher than expected for the current conditions". I think the next two are a direct result of the MAF issues. They were P0172 and P0175. They basically say that banks 1 and 2 are running rich. So from all this I am guess I need to replace the MAF. Or, is there a way to clean it? I will check the stepper motor since it is something I can do today. If you guys think I will pick a MAF tommorow. Let me know, thanks again. | ||
| Matt Anderson (Disco01) Senior Member Username: Disco01 Post Number: 254 Registered: 10-2003 |
You can clean it by getting some electrical spray cleaner that will not leave a residue. You can get it at autozone. You could at least try this. | ||
| Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 6 Registered: 02-2004 |
By visual inspection the MAF looks clean. Does that mean anything? Also is the steper motor the device at the very back of the engine. It is cylinder shaped and about 2" long and 2" in diameter. | ||
| michael a. kerr (Ethanrover98) Member Username: Ethanrover98 Post Number: 49 Registered: 11-2003 |
Paul, Go to the "Tech" section and then go to "FAQ" and you will find pictures of the stepper motor location................ | ||
| Matt Anderson (Disco01) Senior Member Username: Disco01 Post Number: 255 Registered: 10-2003 |
Paul, I what you are talking about is the starter. The stepper motor is simply a bypass of the throttle plate so that the engine can get more air when you are idling and the throttle is closed. | ||
| Paul D. Morgan (V22guy) Dweb Lounge Member Username: V22guy Post Number: 2494 Registered: 02-2002 |
Paul, Your D2 with the "Check engine light" might have a couple different problems. The first thing that comes to mind is your MAF Sensor.
No, it doesn't mean anything. It could shorted out and look just fine. Hence why these guys are telling you to check codes. Secondly, plugs. Plug wires to be exact. You might have a short. Spray mist water over the wires to see if any spark. This will tell you if you have a short. If you just bought this thing with 55K on the clock. I would definately have the 60K service done early to rule out any other issues. Paul | ||
| Paul DiNella (Pdinella) New Member Username: Pdinella Post Number: 7 Registered: 02-2004 |
I think this one solved guys. I pulled the connector off the MAF and took it for a test drive. I pretty much ran perfectly no RPM loss and no stalling. I then reconnected the MAF for the return trip and the engine immediately started bogging down and almost stalling at every stop. I think I will pick up the new MAF tomorrow and hopefully I will be good. I am planning on getting the 60k service after I get the 45k service the previous owner never got. Thanks for the help. | ||
| Paul D. Morgan (V22guy) Dweb Lounge Member Username: V22guy Post Number: 2495 Registered: 02-2002 |
Good to hear Paul. | ||
| Ron Brown (Ron) Senior Member Username: Ron Post Number: 708 Registered: 04-2001 |
Paul, Go buy a new MAF. They are pretty cheap at the dealer or the usual suspects. VERY common failure on DIIs, and I know I am harping on an issue I always harp on. IMO they should be replaced at 60k as a service item. Ron |
