I have verified that we have spark and fuel but it just sputters when you crank. It seems like it wants to start but just never catches on.

The OBD puts out a 2-1-2 code for a failed O2 sensor. Ignition OBD comes back clean with a 1-1-1.

I can't imagine a failed O2 sensor preventing the car from starting.

Any ideas? Thanks in advance.

Curt

My '93 940 (130,000 mi) with the Regina system acted the same way. I concluded that the problem was likely the fuel pump. I reviewed Art Benstein's excellent pictoral sequence on replacing the pump. If it had not been a stormy winter day, I might have elected to do the job myself. Instead, I took the car into a local Volvo indy.

The mechanic checked the fuel pressure and said it was very low. They put in a new pump and fuel relay. Cost was a bit steep at $551! More than half was labor. The car runs like a champ again.

There was no warning on this failure. My wife drove back to town from visiting our daughter (25 mi), parked at a supermarket, and could not get the car started when she came out. Terrible rain storm, had AAA tow the car home and then did my own troubleshooting. Barring a loose wire at the tank, I figured it was the pump and I was right.

that was an excessively high charge.I did the pump on my 89&it took me a day at most.
Then I still couldn't get it started after the pump&sender assembly&sock replacement,,what finally was the problem was the base of the ign coil was not sending the signal to open the injectors.replaced that&now its been humming along great!!
I should have just spent $45 for a Bentley manual&I would have avoided a lot of grief....great car!!,



&&the pump from fcp is about $125 MAX>
Most times its probably the sock that is clogged up.Or it could b the wire going through the pump housing.I put in one from a junker w a new sock& its been working perfect.

... this misinformation:

"... what finally was the problem was the base of the ign coil was not sending the signal to open the injectors."

I believe some so-called "mechanic" told you that, but it is total BS. There is absolutely no connection between the ign coil ("base" or otherwise) and the injectors. This bogus tip could send readers off on a wild goose chase. It sounds like a screwed up version of what can actually can happen...

If the ignition Control Unit fails to send timing pulses to the Fuel Injection CU, the injectors won't open because the whole FI system is dead without those pulses.

If the Ignition "Amplifier" (in the coil "base") fails, there will be no spark. But since the Ignition CU has no way to know about it, its timing pulses still go to the FI ECU, allowing the Fuel system to run.
The result is no spark - no start - and wet plugs.
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

I tend to agree with Randy's suggestions below. Here's what I was typing when he got in first:

How did you "verify fuel"? Did you measure the pressure while cranking? The small amount of fuel pumped when the key is turned on is not enough to keep the engine running.

How many miles on the car/pump? Low pressure from a dying pump could explain the symptoms, including the OBD code from the sensor–due to improper fuel mixture.

Was that code maybe a 2-2-1? Because there is no 2-1-2 code for the Regina. Don't immediately blame the sensor (don't shoot the messenger). It just means the sensor "reported" an out-of-spec reading on the fuel mixture. It doesn't mean a "failed O2 sensor".
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

I verified fuel by pulling the rubber line going to the fuel rail. Looks like fuel pump time...

Thanks for your help!

Curt

I verified fuel by pulling the rubber line going to the fuel rail. Looks like fuel pump time...

I am not sure I understand your post. Are you saying that there is no fuel at the rail or that there is?

"Pulling the rubber line" sounds like you might be talking about the smaller vacuum line that attaches to the front side of the fuel pressure regulator. There should not be any fuel there unless the fuel pressure regulator is defective. The fuel supply line is connected at the rear of the fuel rail. It is a larger rubber encased line that attaches to the rail via a metal fitting that takes a 17mm wrench with a 15mm(?)wrench to hold the rail side.

How much fuel is in the tank?

Randy

This Photo/Text Sequence by Art Benstein may be of help.

There's some info in the 700/900 FAQ too, which may or may not be right on the money.
I've found it's not all 100% gospel there.
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

I had a RexRegina equipped car that displayed nearly the same behavior of having spark and apparently fuel.

Once I put a pressure gauge on the fuel rail I found I had extremely low pressure. The pump would run and discharge fuel from an open rail connection but pressure was almost nonexistant.

A new pump solved my problem. Any idea on how old your pump might be?

You can rig up a fuel pressure gauge from the connectors from a donor car as shown in the photo.

Randy

what PSI should one expect??- what size gauge to use? looks like 100psi on that unit.

That gauge was just what the hardware store had to offer when I went there looking. That rig is just for diagnostic purposes so it is not a gauge designed for fuel applications.

I think different injection systems have different specs, but 35-40 psi is what I normally find at the rail.

Randy