I am so frustated I do not even know where to start. My car has 185,000 miles at it is a 240 1990. The started by just hesitating to start and drive. The car at this point is not starting at all. It does not matter if it has the AMM on or off it will not start. The car a full gas. I have to put a fuel pump relay, spark plugs, fuel filter, fuse for the fuel pump, clean the computer etc. One mechanic told me that it needs new fuel injectors and a new computer. I do not know who to beliveve anymore. What could the problem be. I am running out of options. The last place I wanted to take to is the Volvo dealer.Can I do this myself. I need help.

Your '90 has the onboard diagnostics.
look in the 700/900faqs, and learn how to read the error codes, then post the codes to get a better idea where to start.

Does it have spark when cranking?

Do the fuel pumps run when cranking? (E.g., does it have fuel pressure?)
--
Don Foster (near Cape Cod, MA)

The car does have spark when cranking I beleive. I am so frustated that I took it to the dealer today. I hope the price will be correct. I am not sure if the ful pump does work when is cranking. I do not know how to know if the fuld pump is running.

You posted similar messages on Sunday. Did you read ALL the responses? Please give details, and be consistent.

- previously, you said the engine WOULD start, but you have to keep your foot on the gas pedal to keep it running. Now, are you saying that it will not start at all, even holding the accelerator pedal down?
- on Suday, you said the car runs slightly better WITH the AMM plugged, and worse when it is unplugged. (NOTE: do not unplug the AMM while the car is running!!! Shut the engine off first!) Is this still true?
- one suggestion was to check the Idle Air Control unit. Did you clean it?

Here is one of the replies from your Sunday post:
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On the 1990 240, idle speed is regulated by the Idle Air Control (IAC) unit. If the IAC is clogged up with grease/oil/engine blow-by, it will cause similar symptoms. My suggestion would be to make sure the IAC is clean, first.

When your engine is at idle, with no foot on the accelerator, the Throttle Body (TB) plate is closed. To reach the engine, air bypasses the TB by going through a hose to the IAC unit, then through another hose up to the intake manifold. Then engine computer monitors and controls the IAC unit, causing a little "door" to open/close inside, just fast enough to keep a steady idle speed. When you depress the accerlerator, the TB plate opens. This allows more air to flow straight through to the intake manifold instead of being routed through the IAC.

From your description, it sounds as if the IAC unit is malfunctioning (hopefully just full of "gunk"), or one of its vacuum hose may be clogged, keeping the computer from maintaining idle speed. Therefore, you must press the accelerator pedal to allow air to get in thru the TB. So clean the IAC before doing anything else. You need a small screwdriver to remove it, and a bottle of carb spray cleaner. (I think yours is a sealed unit like mine, so you cannot disassemble it.) I would also replace the Flame Trap, clean the Throttle Body, and make the Throttle Position Switch is set correctly. There are detailed instructions in the 700/900 FAQ on these procedures.

IAC UNIT LOCATION: follow the plastic air hose from the AMM to the engine. Just before reaching the throttle body, there are two smaller hoses. One goes over/around the intake manifold to the plastic Flame Trap holder. The other hose goes under the intake manifold to the IACunit. It is a small silver/gray cylinder 6-inches long(?), attached to two hoses at one end and an electrical connector on the other end.
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We may just have a misunderstanding of terms. Please provide all your troubleshooting steps taken so far. Usually, the more details you give, the more helpful the responses... And get a repair manual! It will pay for itself the first time you use it!

[[ southern fried volvo - 1991 240 133k mi ]]

The engine does not start anymore but it does crank. Even if I hold the pedal down it will not start. I finally took it to the dealer.It does not matter if I have the AMM on or diconnected it just crank now. Thanks

Did You replace the fuel pump relay with a NEW one? (older ones can get corroded contacts, inside)
Clean the fuse holders.
If this doesnt fix the problem, it could be a something that doesnt happen very often: a leaky fuel injector. If your 240 wont start after a coupla tries, press the gas pedal to the floor, hold it, and turn the key (like you are starting a big 'ole flooded Chevy V-8),she should start up in a few seconds with some spitting and sputtering. (and maybe sound like that old Chevy)
My '88 244 did this for a while, until I started using her as a daily driver, then the problem went away. Also I never replaced any fuel Injector, just added a good Fuel Injector every 3rd, or 4th tank of gas.
A good habit, if you dont already do this, is whenever you go to start a Volvo, turn the key on, wait for the count of 3, then start. Never pressing the gas pedal in the process.
I hope this fixes the problem. Ive found with a 200 series model, The problems are usually small, and fixable.
GoodLuck!

My car has trouble starting,when the car wont start I wiggle the 25amp fuse wire in the engine compartment and that will send voltage to the relay and than the car(mine)will start. My fuse wire is bad. Have you tryed to wiggle that wire.
--
Kevin * HONDA spanking,1985 240DL * VOLVO ON!!!!