Hi All

Just been having a problem starting my 2002 V70 2.4T. It happens intermittently (not all the time just sometimes) when the engine is warm. Doesn't seem to happen when cold. It will crank and crank but will not start. Sometimes it throws a message "Reduce engine proformance" when it finally does start, but there is no reduced profomance, it runs fine with smooth with quick response. It doesn't flood or anything like that. When it starts to crank and crank if turn the key to off wait a second and try again it starts right up.

I had the A/C serviced at a Indy which specializes in Vovlo so I had them check it out(I was feeling Lazy). They said they found one crank senor message from a while ago but nothing else, no other codes / no check engine light. They pulled the sensor, found a little rust on it so they cleaned it. But the problem was there a few days later.

Any help would be appreciated.

Ketchb

I don't know how well this transfers from the 850 since the '02 has a different relay, but I experienced this when my fuel pump relay was crapping out. When you're cranking and its not starting can you hear the fuel pump aworking? If not then its possible the relay is going bad. After a moment or two it will reset and you should be good, until it occurs again...

First off, how do your plugs look?

Second, how often is 'intermittent when warm' in your book? Every day, once a week?

Thirdly, has it stalled out at all?

Any update on this?

EDIT: Sorry, this was supposed to be a response to the original post by Ketchb.
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Kyle - 244! - Kawasaki Ninja 250R - Oregon Volvo Tuners?

Hi Tmannian thanks for you interest.

The Plugs look fine the last time I changed them, I did that because of this problem but it didn't help.

I do a lot of driving with shuting down and starting again, so it can happen a couple of times in say....10-15 starts????

No problem with stalling.

It seems to help if I step on the gas when trying to start, which is not normal for a fuel injected car. If I sense that it's going to not catch I'll step on the gas and it catches. When it was at the shop they checked the fuel pressure and rest pressure and said it was ok. They removed the rest pressure from the system and it still started right away. It's got me guesing.

without stalling at other times, or a longer stall here's my best guess:

Your camshaft position sensor

You say your indy shop checked codes and nothing came up, do they have a general scanner or volvo specific? Allegedly your computer picks up on your electronics not working and will trip a code even if the CEL doesn't come on. A ECM-3000 or 3010 showing up would explain your problem. You could probably get the dealer to read your volvo specific codes and confirm or refute before you spend the money on a new sensor.. Just talk with their parts guy and ask if they would read for free, i know the one out here does.

But without that, Below is a link to where the CPS is on your car. You might want to pull it out and check the connection. I believe it works on induced current so there won't be too much for you to damage if you use brake cleaner, but I'm not actually sure on your car. (THAT MEANS USE CAUTION...) :-)

Hopefully thats all she needs, but you might have to replace it.

http://farm5.static.flickr.com/4082/4797457802_ea92f78d28_b.jpg

Thanks for the diagram it's a help locating the senor.

I think the inday shop has a volvo specific reader, they specialize in Volvos. They sell a ton of them, we bought our there. They said it showed a ECM 5200 rpm sensor faulty signal but only a one time fualt 274 cycles ago. Sometimes when it's cranking over and over the tach will bounch around, one time it just sat at 0 so could it be a heat induced fault in the crank sensor. Does that ever happen?

Yes, heat does play a role with the connections. I would unplug the rmp sensor and clean the contacts, grease them up with di-electric grease, and firmly plug it back in.

The tach should NEVER bounce around.

Also consider an Italian tune up. High rpms tend to clean up the flywheel as well as the valves and cylinders.

Klaus
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Why are Volvos so endearing? Its just a car.

270 cycles ago, if you start your car 10-15 times a day thats 20-30 days since it came on, and cycle=on off, so each crank adds to it. IIRC the code tracks from initial setting off not every time. So if you've had the problem about 2-3 weeks that would make sense. You might try throwing the car in neutral when running, hitting the pedal just to see how high it revvs. Don't go past redline but if it stops around 4-5k it could be the rpm sensor... There is an RPM sensor on the top of the bell housing of your transmission so you might want to check it for connection and whatnot..


Here's what volvo says on that code...

Condition

The control module calculates the number of teeth on the flywheel using the engine speed (RPM) sensor. Diagnostic trouble code (DTC) ECM-5200 is stored if the control module detects at least one tooth too many (Signal too high) or one tooth too few (Signal too low).
The control module detects the position of the flywheel for top dead centre (TDC) using the signal from the speed sensor. Diagnostic trouble code (DTC) ECM-5200 is stored if the control module is unable to detect top dead centre (TDC) on the flywheel (Faulty signal) or if the reference position for TDC is missing sporadically.


Substitute value
-The control module uses the signal from the camshaft position (CMP) sensor if the camshaft position (CMP) sensor has been adapted
-Variable valve timing control is blocked
-Engine speed (RPM) is limited.


Possible source

Signal too high:
-Signal interference.
Signal too low:
-Incorrectly installed engine speed (RPM) sensor
-Defective flywheel or ring gear.
Faulty signal:
-Signal interference
-Contact resistance in the terminals
-Incorrectly installed engine speed (RPM) sensor
-Intermittent faults in the wiring for the engine speed (RPM) sensor.
Signal missing:
-Signal interference
-Contact resistance and oxidation.


Fault symptom[s]
-Engine difficult to start
-Poor drivability.

Thanks for the input Klaus and Tmannian. The info from Volvo should help in trying to track this thing down. I'm straight out for the next few days but I hope to get to the bottom of this soon.

Ketchb