2004 Volvo S40 Cranks but Won't Start

richardmills2 · Post by **richardmills2** » 21 Sep 2015, 12:32

The s40 cranks but won't start. Error codes were saying a couple cylinders were misfiring and camshaft position sensor. I have checked the battery at AutoZone and it was good (even charged it). Replaced the coil with both cylinders reportedly misfiring but still didn't start. Tested the old coils and all 4 cylinders were firing. Replaced all 4 spark plugs. Replaced camshaft position sensor but still didn't start so I returned it. Replaced the crankshaft position sensor still didn't start so I returned it.

Next was addressing the fuel. Replaced fuel pump and fuel filter, still no start. Replaced the fuel pressure regulator, still didn't start. I didn't have a fuel pressure gauge to test the PSI on the fuel rail but when I pushed it in the fuel just came out like a water fountain.

I have not tested the compression on the cylinders or timing. Up to this point car was running and the next morning it wouldn't start. It has been sitting now for about 30 days as I try to find time to troubleshoot. Any help is appreciated.

Dirk1966 · Post by **Dirk1966** » 22 Sep 2015, 03:52

Did you work on the timing belt before the non starter?

Post by **Clockboy** » 22 Sep 2015, 05:51

I know you replaced the cam shaft sensor and that did not work, but did you test for continuity and signal to the sensor? What about the fuel injectors?

richardmills2 · Post by **richardmills2** » 22 Sep 2015, 12:22

The timing belt has not been checked and I don't believe has been changed. The car belongs to my son's girlfriend so I have a hard time committing to troubleshooting it. Hence the more than 30 days sitting. I have little experience with timing belts or timing in general. A mechanic told me that if it was the timing it would turn over and backfire. I am not getting that. All it does is crank but not start.

As to the continuity and signal to the sensor I have not. Is there a specific voltage I am looing for? I have pulled the fuel injectors but did not replace them. The fuel injectors are on the fuel rail. At the end of the fuel rail is where the connection is to test the PSI. I turned the key to prime the fuel system and then pressed down on the valve. That's when fuel just came out like a weak water fountain. I am being told that it should spray out, 40-50 PSI.

Appreciate the help as I try to get this car running again.

Post by **Clockboy** » 22 Sep 2015, 15:13

I reread your post and noticed that you had replaced the coils and said there was spark. I'm assuming you had tested for spark so that is not the problem. When my cam sensor went there was no spark. If it were me I'd check the fuel relay just to make sure it was ok then the pressure at the rail. Are the fuel injectors spraying fuel when energized? I'm assuming not since then you would have fuel and spark and something should happen. Is it just a coincidence that you had the code for the cam sensor - I'd check that circuit also. Not sure what the values should be on that car, but I'm sure it is in the site somewhere. I think the cam sensor influences both the ignition and fuel injectors, but am not sure if you could have one without the other. If so it could be an issue at one of the connections. There are some interesting threads on no start situations. I've got a 98 v70 so am not really familiar with the s40. As an aside I had gotten a code for the cam sensor 4 months before it went. I had reset it and there were absolutely no symptoms until it just didn't start one morning.

Post by **Clockboy** » 22 Sep 2015, 15:16

If the pressure is not right what about the fuel pump?

Dirk1966 · Post by **Dirk1966** » 24 Sep 2015, 07:52

richardmills2 wrote:The timing belt has not been checked and I don't believe has been changed. The car belongs to my son's girlfriend so I have a hard time committing to troubleshooting it. Hence the more than 30 days sitting. I have little experience with timing belts or timing in general. A mechanic told me that if it was the timing it would turn over and backfire. I am not getting that. All it does is crank but not start.

As to the continuity and signal to the sensor I have not. Is there a specific voltage I am looing for? I have pulled the fuel injectors but did not replace them. The fuel injectors are on the fuel rail. At the end of the fuel rail is where the connection is to test the PSI. I turned the key to prime the fuel system and then pressed down on the valve. That's when fuel just came out like a weak water fountain. I am being told that it should spray out, 40-50 PSI.

Appreciate the help as I try to get this car running again.

My 2003 1.8 S40 was lacking power and had a P0340 error .
I found out that this was caused by incorrect timing. When trying to change it without cam locking tools ( should not have done this) I moved the timing that far out that it would not start any more and also not backfire. Still the pistons where not hitting the valves. If the timing belt is old it could have jumped a tooth or more and causes this problem of a non starter.
Don't know if you have a code reader to see if any faults are logged?

richardmills2 · Post by **richardmills2** » 30 Sep 2015, 06:50

The codes were read. Unfortunately they are not on me.

As for the spark at the coils, I am getting spark with the original coils. 2 of the codes were 2 different cylinders misfiring. It just so happened that both cylinders are on the same coil. Replaced the coil with a new one and still no start.

The fuel pump has been replaced. It is brand new. An Autozone employee stresses to check all of the fuel lines from the fuel pump to the fuel injectors. He believe somewhere along the fuel supply system you may be losing pressure.

Still does not start.

Post by **regent** » 30 Sep 2015, 08:09

richardmills2 wrote:...somewhere along the fuel supply system...

includes the fuel filter. If it is 'old enough' it might be the offender (and a replacement costs a lot less than a new pump, too)

richardmills2 · Post by **richardmills2** » 30 Sep 2015, 17:19

fuel filter has been replaced