View Full Version : will not start in cold weather


russburcham
01-03-2010, 06:55 PM
hello all- love the forum and it has been most helpful! hopeful that someone can help me out. i have an '01 disco w/ 110k miles- regularly serviced-- i live in tampa, fl and it has been cold the past few weeks (for florida anyway). Every time i try to start my truck when its VERY cold in the AM, it will not turn- it sounds like it is cranking nicely, but will not turn over--had battery/alt checked and is fine--baterry only 2 mos old--
had to have it towed to my mechanic and he replaced 3 out of 4 O2 sensors (one was on back order, but coming this week) it has been starting just fine until our latest cold front... (35F low) could this last new O2 sensor seriously be the culprit and if so, why has it started w/o 4th new O2 sensor on warm mornings? thanks for any help!!!

joey
01-03-2010, 08:51 PM
If you mean it turns over but doesn't start, then replace the Crank Position Sensor.

russburcham
01-03-2010, 09:28 PM
If you mean it turns over but doesn't start, then replace the Crank Position Sensor.
Yes- that is what I mean-- is this sensor "sensitive" to cold weather?

joey
01-03-2010, 09:34 PM
when it starts to go bad, it is just sensitive period... may work one day not the next... cold/rain... cloudy sky.... it isn't very forgiving till it fails completely and it will not start.

russburcham
01-03-2010, 09:38 PM
when it starts to go bad, it is just sensitive period... may work one day not the next... cold/rain... cloudy sky.... it isn't very forgiving till it fails completely and it will not start.

thanks pal- have been reading up on some of your other posts--great stuff! i'll check my rave about installing crank sensor- is this something that O'reilly/Advance/Autozone, etc may carry? pretty easy DIY? i'd love to NOT bring it to my mechanic- I'm sure you appreciate!

joey
01-03-2010, 09:44 PM
Call Nathan in my signature or go to www.atlanticbritish.com

russburcham
01-04-2010, 02:49 PM
Call Nathan in my signature or go to www.atlanticbritish.com

update: As my mechanic "owed" me an O2 sensor anyway, i had AAA tow it into him this morning-- called him up and my mechanic stated that it started right up for him after taking it off tow??? i asked him about crank sensor and he mentioned re-checking it in the AM when it will be very cold-- he also mentioned NO codes were found and that may mean IDLE CONTROL VALVE??? Joey or anyone else- what do you make of this? make sense?

joey
01-04-2010, 02:59 PM
IAC or Idle Air Control is possible, but I will bet on the CPS.... I wouldn't bet my pay check, but I would bet a good dinner out on it.

Disco Mike
01-05-2010, 09:32 AM
Crank sensors are hot sensetive not cold sensetive 95% of the time.
Rovers don't have cold start issues, especially in Florida where it doesn't get cold. Here in Colorado where we can have -20 below, that is cold and they start right up.
That being said, how many miles on your truck, what fault codes has your mechanic been getting, be specific, when was it last tuned, with new wires?
My concern regarding the 02 sensors, is your missed on this one, they can't cause cold start problems because they are not even activated by the ECU until the engine reaches operating temp, so they are not the cause of your problem.
Get the codes and get back to us.

russburcham
01-05-2010, 11:28 AM
thanks Mike- I'm SURE you are right...my last tune up was th 90k service at about 80k and now i have 110k it was done w/ proper wires, etc-- i've had all 4 O2 sensors changed, the Alternator was making an unusual noise, (probably a bad bearing) so I swapped that out. I put an after market tow light pkg on about 3 months ago, but drove just fine until just recently w/ the cold weather (i also have a 3 month old duralast gold)...My mechanic changed out the IDLE air control valve this AM, with a spare he had on hand and said that it started up, and is going to dirve it around town w/ the computer attached to see if he gets any codes, but he said there were ZERO as of this morning. I had a problem w/ the 3 amigos about 8 mos ago, bu that was all repaired. (new master cylinder, and modulator and a couple of new sensors)-- and that's about it! He suspected another sensor (relating to the fuel supply?), but it was not showing any codes on it... any thougths?

again thanks so much!!!

Disco Mike
01-05-2010, 11:41 AM
Stay in touch, let me know how the new idle control solenoid works.
If you still have a problem lets talk.

russburcham
01-05-2010, 12:58 PM
okay- just got off the phone w/ the mechanic--he is charging me ZERO for all the work as i've been going to him for yrs w/ 3 rovers and he had spare parts laying around--he drove the car for about 20 miles around town and NO CODES-- he suspects that it may be an alarm issue, (as i neglected to mention, the driver door lock mechanism sometimes fails/sticks and i have to unlock manually w/ the key), BUT that problem has been ongoing for about a year...Does this make sense?

Disco Mike
01-05-2010, 06:18 PM
If it were an alarm issue, the engine would not turn over, the alarm would go off and the red light on the dash would be flashing very fast.
Bet you still have a problem.

russburcham
01-05-2010, 07:48 PM
yes- that's what i suspect as well, going to local parts store to get a Crank sensor and install this wknd- (is it true there is sometimes no code for this?) thanks again for all the help--

joey
01-05-2010, 09:08 PM
yep sometimes or most of the time no code.

At least that is what I have seen.

bradalex55
01-09-2010, 01:34 PM
Hey guys same things happened with me too my rover always give a bit problem in winters while starting also in snow it really need sometime to start

russburcham
02-11-2010, 05:18 PM
So my '01 disco w/ 107k miles won't start again. My mechanic has replaced and/or checked my 02 sensors, MAF, idle control valve among other things- he is getting fuel pressure and replaced my faulty driver side lock module. he is getting NO codes on it at all and has finally checked my ECU. he said it looks a bit "burnt" and thinks it may be the problem. (occasionally starts, un-hook battery for a day a may start or may not, etc.) My friends, could this be the culprit, and if so, what $ am I talking here for a good used one?
note: he finally got my car running by clearing all the codes anyway that weren't there? (does this make any sense to you gbuys?)
he is pulling a used one tomorrow to hook up to my truck too see what happens-

Thoughts?

joey
02-12-2010, 11:32 AM
First unless he has the LR specific computer that will reset the ECU I wouldn't recommend the test unless you don't ever want to drive your Disco again...

Second sounds more like a crank position sensor is bad.

russburcham
02-12-2010, 01:49 PM
hi joey,

yes, it is a land rover ecu (my mechanic ONLY works on land rovers) he was going to swap one out - and he does have the laptop based test book computer. Also gets some of his programs and tech info from Cypress or Crete--or something like that- does this make sense?