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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

My 245 died while driving. Running fine before that. Now a crank no start. It is getting spark and gas. There was a hissing noise by Fuel Pressure Regulator so I replaced FPR but no change and still hisses. Sounds like an air leak but don't detect any air blow by. No gas leaks on fuel system.

No fault codes are showing up for fuel system-i.e no blinking lights which is not helping me. Wonder why no blinking lights on fuel side, The ignition system has no faults blinks 1-1-1. Without fault codes now I am throwing darts in the dark. Any ideas before I take to shop? Thx








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

Interesting clues you are passing out here!

You crank the engine with no start but two out of three things needed are there to make it run?

I like the jumped timing belt idea if you never went back and reset the tensioner after the run in period on the belt. I like to do it again after 50 to 100 miles but some say ten minutes on V belts but they are made out of more rubber where a timing belt is practical all cord.

It doesn't run but you have hissing like a vacuum leak or a frying sound. Now that's tricky!

Close to the FPR? How about checking repacing the rotor button and checking distributor cap for cracks or carbon tracks underneath.

That Hissing sure can be a sneaky snake! That type of sound is hard to locate directionally. In the woods you freeze until you locate it!

Check for a broken check valve at the brake booster hose or its the hose itself being split!
A Big leak in that will cause a no start and hiss after a cranking moment.

Did you pull the plugs to verify fuel or are you just smelling it?

Phil








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

Check the condition of the 25 amp fuel injection computer fuse and its fuseholder/wire under the hood behind the battery. Look for a blown fuse, corroded fuseholder or a loose or a corroded wire.








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

Timing Belt may have jumped a tooth or two?
Dan








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

Did not consider that to be the problem with a new t-belt last year with less than 3k on it now. Should it be in the mix?








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

It is something to consider, you have spark and fuel but do you have them when you are supposed to?

Dan








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

A new timing belt stretches after install.

Best to reset the timing belt tension several times, within the first few hundred miles after install.

Though a better quality belt, like ContiTech, probably stretches less than other vendor timing belts.

I also reset the timing belt tension at each oil change. Simple to do.

Though if the t-belt skips a tooth or two around a camshaft cog, the red-block engine would exhibit the 'about to catch before running behavior' if not too many t-belt tooth alignment is not off too much. Unless skipped on the smaller crankshaft t-belt pulley.

Else, follow all recommendations you have here on failed fuses. Consider corrosion where the fuse contacts meet the fuse holder at the in-engine bay 25-AMP fuel injection system fuse (though the ECUs have power as you can read the OBD codes), though these failures begin as intermittent failures, usually. And I forget that sometimes. If intermittent at the 25-AMP fuse in engine bay fuse, any fault codes may be lost as the ECUs lose power, resetting to 1-1-1 in socket 2 and 6.

As you are able to access the OBD codes in socket 2 (LH-Jet fuel) and socket 6 (EZK spark ignition and EGR if fitted), check the white fuel injection relay for fault, located on the firewall and under the glove box. The high tension side, as we know, can form fractures from years heat around the relay.

Fuse #4 protect power from the in-tank fuel pump.

May want to jumper the fuel injection relay socket to verify both fuel pumps run. See:

http://cleanflametrap.com/transferPump.htm

Courtesy of Art B.

If no OBD fault codes in sockets 2 (fuel) and 6 (ignition), maybe an ignition power stage fault? (Located on inner fender as the side of the battery nearest the inner fender. Corrosion at the connector, or, if the heat sink compound failed, the power IC has failed. Keep spares! No fault codes for a failed or malfunctioning power stage.)

Yet, if the crank shaft speed sensor (engine position sensor) has a fault that formed instantly, shutting off the engine, an OBD code may not have been set. The ECUs can sometimes be slow setting a fault code in spite of poor engine performance.

When do you hear hissing if the engine is not running? Did you hear a hissing when the red-block engine was running before? The hose between the AMM/MAF out to the throttle body or other vacuum line leak around the idle control motor. Or your air intake port gasket is dried and fried, requiring replacement.

Hope that helps.
--

--
Volvo 164: The Mightiest, most Powerful, most Beautiful of All Volvo Automobiles Forever








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

verified all possible recommended items noted in thread and it led me to a dead ECU. Swapped from another 240 and fires right up. had the pink 561 ECU. upgrading to the 951. Thanks for your input!








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

Not sure how you had spark and fuel with a dead ECU?

Dan








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

I had gas through the fuel rail and assumed it was getting to plugs but it was not. chplugs. I also had no blinking lights on OBD for fuel only ignition system blinked. Once I swapped the ECU all good. It never hissed at ECU only by the FPR which I am now calling a red herring. Runs fine now.








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Crank no start getting gas and spark-abnormal hissing sound by Fuel Pressure Regulator 200 1990

Interesting post again!

The ECU was hissing? I know it does a lot talking with other components but hissing, that's new!

Surprise to here a of the pink 561 in a '90 car. Thought they were in mid eighties cars?

Sure hope you got the problem!

Phil







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