1990 volvo 240

ivylynn · Post by **ivylynn** » 22 Jul 2014, 12:43

Runs rough first thing then evens out after I give it some gas this will happen maybe a week or two then problem vanishes for months then will come back out of the blue act up then go away again doesn't matter if its winter or summer

93Regina · Post by **93Regina** » 22 Jul 2014, 20:16

ivylynn wrote:out of the blue act up

Chevron Techron Concentrate Fuel System Cleaner (20 oz.)

ivylynn · Post by **ivylynn** » 23 Jul 2014, 23:34

already tried that but thanks

93Regina · Post by **93Regina** » 24 Jul 2014, 11:45

ivylynn wrote:Runs rough first thing then evens out after I give it some gas....

Mechanical, Electrical, and/or Fuel issue...???

When key is switched to on position, does the fuel pump engage for a few seconds? If so, from now on, turn key switch to on position, listed for pump, then after two seconds, turn key to start position.

Schrader port on fuel rail - Does yours have one...if so, measure fuel pressure after key is switched on

ivylynn · Post by **ivylynn** » 27 Jul 2014, 12:25

My car has been starting fine last few days today though I turned the key to on position heard a hum followed by a couple clicks and then started it and started rough

93Regina · Post by **93Regina** » 27 Jul 2014, 20:17

If yours has a Schrader port on fuel rail , try using a tire pressure gauge, when engine is cold. It may spray gasoline, so you might use a cloth around gauge.

ALSO _ http://cleanflametrap.com/transferPump.htm