1991 240 dies when warm - tried both fuel pumps, relay, regulator

MrMorones · Post by **MrMorones** » 24 Apr 2017, 19:23

Hi all. I need some help. I have a 91 240. After car warms up my car will die. I have had it die while idle, while accelerating, or while putting in gear after parked.

I have replaced fuel pump(external), fuel filter, in tank pump, strainer, fuel pressure regulator, and fuel relay.

What am I missing? I am losing sleep over this. Please any help?

lummert · Post by **lummert** » 24 Apr 2017, 21:07

Ignition Power Stage?

93Regina · Post by **93Regina** » 24 Apr 2017, 22:22

MrMorones wrote: 24 Apr 2017, 19:23What am I missing?

Does it have fuel...does it have spark...

joedrt77 · Post by **joedrt77** » 03 May 2017, 13:58

My 90 740 was doing that, replaced 1323592 Noise Suppression Relay (AKA: Radio Suppression Relay or "RSR"). fixed it, replaced relay and relay connector, both relay and connector were bad, I just used a relay with the same specs., cost a few bucks, works the same as the 65 dollar one.

lummert · Post by **lummert** » 03 May 2017, 14:15

joedrt77 wrote: 03 May 2017, 13:58 My 90 740 was doing that, replaced 1323592 Noise Suppression Relay (AKA: Radio Suppression Relay or "RSR"). fixed it, I just used a relay with the same specs., cost a few bucks, works the same as the 65 dollar one.

Radio suppression relay supplies power to the injectors, among other things.

dougburgy · Post by **dougburgy** » 15 May 2017, 14:32

IAC (idle air control)? Sounds a lot like symptoms of bad IAC, which is up on throttle body. Maybe research that, specific to your car and see if others have reported same. Check all vacuum lines and electrical plugs in engine bay. Injectors, spark plug wires (at plug and dist), etc.

When you say it dies...do you mean like engine stalls...but all other electrical seems fine?