Volvo 850 2.0 1995 non starting already fitted new plugs leads cap roter arm cam and crank sencors good spark good fuel presure and no imobliser light on plugs all dry when turning over engine

get a spark tester ,this is only a basic test .check the coil for a spark if found remove the lead from the spark plug. plug in the tester. turn the engine over to test for a spark each time. if no spark found check and clean the contacts in your distributor cap and rotor arm then refit test for a spark. at the lead to the spark plug .if found now remove your plugs one at a time .smell for fuel .if found change the plugs.

1/ Have you fitted the spark plug leads in the proper firing order.
2/ Look inside the top of distributor Top (this is not the first time a new distributer cap has very small crack) or the rotor arm is fitting the cap properly. Hope this helps Best Wishes, Malcolm Campbell.

If you are sure they said, a distributer cap a roter and a distributer, there is a problem! Because on a 1998
plymouth, there is no distributer or cap or roter.
Your cam sensor along with the crank sensor-temp sensor and a few other sensors, send a signal to the
powertrain control module, that sends a signal to the
coil pack(that you said was replaced) that fires the
spark plug. I would hold off from having any further
work done there, until you can check out what they
say they have already done. Ask if you can have the
old parts they replaced so far. You will want to have
an OBDII scan test done, to see what codes come up. It should have one of the first tests they did.
If I have read your post correctly, have them write an
estimate for what they will replace next. This info. is
based on the car being a 1998 plymouth and not a
1988 I would not wan't to acuse somone of anything
based on a typo. Hope this helps. Good luck.

check inside distributor cap for cracks also rotor arm condition also check crank angle sensor on top of bellhousing also cam sensor mounted near distibutor

Check the fuel pump.

It is located in the fuel tank beneath the back seat.

Good luck.

3 things make an engine run, fuel, electrics and gearing, first thing, remove the cap and crank the engine, determine if the rotor is moving, this will eliminate a broken cam, sprockets, chain or broken teeth on the distributer. next with the ignition lights on rotate the roter button by hand in between contacts, you should hear and see small spark, replace the cap and crank engine with a plug lead off, ask a friend to see if it is sparking onto metal nearby. Next remove fuel line and crank engine to see if fuel pushes from the line. then that leaves gearing, timing must be correct, check the lead numbers are in correct firing order and timing is right. Hope this guide helps you, Good luck

Make sure your getting spark to the plugs. It must be a good hot spark.
If that's okay then you might have a timing problem with the crank and cam. (Jumped time).
You'll need to check the timing marks on the crank and cam timing gears to make sure they didn't jump out of time.
Check for any vacuum leaks as well.

check the ecm fuse and power wire from starter

Go to a library that has a set of the factory service manuals (not Chlton's or Haynes or Motor's). The FSM's will give you all the trouble hotting charts that the dealer techs use.

ok, you need to do some other testing. Turn the ignition on, you should hear a whirrling noise for a few seconds coming from the gas tank
,or have somebody listen with gas cap off.If you don't hear it the fuel pump is bad.If you do hear it, have the crank and cam shaft positioning sensors checked, plus the computor.It's a pain,but with these no start problems,you need to use process of elimination, or keep replacing things you don't need. (expensive).Good luck.