S70 died on highway

[Ozark Lee]

Looks like I have fuel to the rail but i am not sure if the injectors are firing, the plugs appear to be slightly wet after turning it over without starting (hard to tell but i can smell fuel). I am getting 6v at the injector in key position II but this does change when i try to start it. What voltage should i be getting to the injectors on startup? I have a 98 S70 and there doesn't seem to be anything on the fan shroud except for the main fan relay but that's not the one you are talking about, right?

You should have battery voltage (12ish volts) on the green wires to the injectors with the key in position II. If you can get someone to crank it for you while you have a finger on an injector you can normally feel it pulse.

Often problems with the master fuel system relay aren't really the relay itself but the wiring at the connector gets crudded up.

...Lee

[cn90]

Have you measured Fuel Pressure to get the exact value (in psi)?

[shegarty]

Update: changed the cap and wires, success!!! Car started multiple times and ran smoothly. Let her warm up completely, drove her around the block. Fine under load at first then hesitation, bit of shudder, flashing lambda light, get her home okay. Misfire on cylinder #2, clear the code try to restart ... one cough and then back to where I started ... arrrrgggghhhhh!!!!!!

[rmmagow]

Did you change the rotor? BOSCH only. You are getting a mis-fire. unlikely, but maybe swap a coil.

[rmmagow]

Any oil in the old cap? perhaps a blown oil seal, the one in back of the distributor?

[shegarty]

Any oil in the old cap? perhaps a blown oil seal, the one in back of the distributor

Bingo! What seal is this and how do i go about changing this?

[E Showell]

It is a rear cam seal and there is a write up on changing it on this site.

[precopster]

There are two rear cam seals. One's behind the cam sensor and the other is behind the distributor.

[shegarty]

UPDATE: First of all thanks to all the input from site members, I don't know what I would do without your insight . The cause of all my woes was a bad rear intake cam seal that was spraying the inside of the distributor with oil and moisture from the top of the engine. Now that I have replaced the seal the old girl is one again on the road. When I took apart the rotor and backing plate the old seal just fell out (so no need to use the sheet metal screw trick). It was completely hardened and not holding back any oil. I initially thought that the oil had been coming from the top of the motor (bad oil cap seal leaking oil everywhere!) but it was obvious who the culprit was once I saw the popped seal. To all of you about to say "do you PCV", I just did that work about a month ago now so no need to worry, and yes I did make sure to clean all of the passages and replace everything with genuine Volvo parts Thanks again for the insights, I would suggest that everyone add this to their list of things to check at next tune up or when a no start condition is found.

[abscate]

All together, now....

It's not the ECU!

Check timing belt..remove cover and check integrity. I hope it isn't that.