20 Most Recent 1990 Volvo 740 Questions & Answers


Fuel Filter yes! Then ck fuel pressure. But it may be a Converter.

1990 Volvo 740 | Answered on Jan 08, 2018


indicate excessive fuel pressure , return line blocked , inoperative pressure regulator ,problem injector seals incorrect voltage to injectors

1990 Volvo 740 | Answered on Oct 18, 2017


Have you checked your fuel pressure?

1990 Volvo 740 | Answered on May 09, 2017


Chilton or Haines publishes manuals for the 740. Of the two, the Haines offers more direct parts removal and replacement info. The Chilton has too much generic filler. Get either on Ebay for less than $20.

1990 Volvo 740 | Answered on Mar 03, 2016


there is an anti siphon device in the tube
There is no need to empty the gas tank at all ( unless diesel has been added wrongly) because the computer in the ECM continually checks the tune up of the engine (60 times a second)
just add the new fuel and the computer will keep adjusting the tuning of the motor accordingly up to and past when all there is is new fuel in the tank
emissions are continually being monitored and the engine settings are continually being reset to stay with in the preset parameters of the program in the ECM

1990 Volvo 740 | Answered on Nov 23, 2015


On the inside of the transmission pan it's at the front at the pump

1990 Volvo 740 | Answered on Feb 12, 2015


ALL B230 motors (excluding the B234) are non interference motors. The answer in the first space is incorrect!

1990 Volvo 740 | Answered on Feb 11, 2015


The car is not equipted with a cabin filter

1990 Volvo 740 | Answered on Dec 28, 2014


FUEL PUMP RELAY IS AT THE CENTER CONSOLE UNDER RADIO BY ASHTRY

1990 Volvo 740 | Answered on Sep 02, 2014


The brake switch is located in a threaded mount above the pedal itself. Optionally, it is screwed into a T piece with a vacuum valve for cruise control.

1990 Volvo 740 | Answered on Jul 16, 2014


My wife had this problem twice - for two different reasons, as it turned out. The first time, the car was not really in park. The AAA mechanic shifted the car to neutral then through all the gears a couple times, then back to park and made sure it set firmly. The key turned fine after that. The second time it was because the key was worn. We used our backup ignition key (which is much less-frequently used and thus much less worn) to turn the ignition switch and release the wheel. Hope this helps. Good luck!

1990 Volvo 740 | Answered on Apr 05, 2014


Define flooding.

  1. Black smoke out of the tail pipe?

If the fuel return line is plugged,it will flood.If the fuel pressure regulator has lost its vacuum signal ,it will flood.

If there is a large vacuum leak,the O2 will see a lean condition and cause the rich condition.gas mileage will suck,big time.

This "flooding" happens when the engine is cold? ONLY?
Be sure the air filter is not clogged and the PCV is not plugged up solid.
Also,there are a few tubes from the valve cover that vents oil vapors into the air filter housing.

During this flood mode,hold the pedal to the floor and shut the engine OFF-it should NOT keep running.(Leaky injectors)...

Do this when engine is hot and cold.

1990 Volvo 740 | Answered on Feb 27, 2014


It is attached at the top of the brake pedal. Lay down backwards and look up towards the dashboard guts.

1990 Volvo 740 | Answered on Feb 19, 2014

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