940 turbo volvo will not start now

So it's not even turning over? Intermittant start problems where it doesn't turn over are usually the starter, they can also be the ignition switch.

it will turn over just not start, its like it is just not getting enough to turn over the engine but the battery is good.starter sounds like its doing its job just not enough juice... thanks

Kasoma Duplantis

Check the quality of the Ground (Earth) strap connections on the chassis runner, engine block and battery. Also check the battery feed to the starter motor and the starter solenoid again for contact problems.

All the best, Peter.

If the engine is turning over normally then the battery is fine. The power required by the rest of the stuff is trivial in comparison. If the battery is too low to start the car the engine will turn over very slowly.

i checked the battery and it is good checked the alternator, its good car sounds like it wants to start but cannoti recently changed the fuel pump relay amd the water pump gaskets so maybe i messed something else up in the process.

Kasoma Duplantis

Bad frequency valve, perhaps?

did he slap , or tap the fuel pump located under the car...right under the drivers seat?...

James Sweet wrote:

fuelpump under the seat? inside or out side? so the tank has a pre pump and their is a another fuel pump under the seat? how hard do i smack it?

Kasoma Duplantis

Depends on the system, LH-Jet will have a prepump in the tank followed by another pump mounted under the car in front of the left-rear wheel well. Newer will have a single main pump in the tank.

hey guys, the one i am talking about us mounted "out side" the cabin, under the car, right about under the drivers seat.....my mechanic showed me this trick one day mine took a "brain fart". he said sometimes the pumps stop (these are for well worn pumps) right between the wires or electrical components, so that a tap will move them enough to run again.....anyway..i used this method to get started about 5 times over the next 20k miles in my 1993 940t untill i could afford a new pump installed.. for about $400...or so...

anyway, get a medum wrench or hammer and crawl under the car so you are about under the drivers seat, look up and you will see a round fuel pump...gentally tap it a few times and start car...if it works, the pump will need replacing sometime soon, in the meantime, just tap when it acts up... good luck !!...

btw: i think there is another pump in the fuel tank...

James Sweet wrote:

It happens if the commutator is very well worn in some segments and the brushes are not making enough contact for the pump to start running if it happens to stop on one of these more worn segments so yeah sometimes you can buy a little time by banging on it, I certainly wouldn't count on that lasting long though, it's just asking to be stranded.

You can buy a pump online for less, it's pretty easy to install with basic hand tools.

Thanks that could be the problem the ectrical system seems fine and it started and then just stoped and then started again. this car is new to me and i am not a real experienced mechanic but this could be the answer. i love this car and i hate driving that crappy van my wife has. thanks.

Kasoma Duplantis

go through and think about the basics:

fuel spark compression

"Thanks that could be the problem"

what did you do or try??

snpboy wrote: