Question about 1990 Buick Century

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Car will not start but will run on ether?

Car quite running check engine light was no used code reader code was ignition spark faillor, changed ignition controle not it.

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Does it have spark now sense you chg. that? if you do, it could be fuel problem. was there any other codes other than that one? maybe crank sensor, cam sensor. if you got spark at plugs, its got to be fuel problem.

Posted on Jan 21, 2009

  • ccn7 Jan 21, 2009

    i'am sorry i should have read your problem alittle closer, you must have spark otherwise it would not run on either. ok now like i said, its fuel delivery problem. can you hear pump run when key is just on the on position? and can you hear the relay click. if you can't hear either one it could be relay, relay makes pump run, or cycle. now you can chk. pump by bypassing everything and going strate to pump. under hood on left side around inner fender well, you will find a red wire that looks like it should be pluged into something but its not, its a direct wire to pump, run a hot wire from your battery to it and if pump is good it will run. but first chk. relay it under the hood too, like i said pump won't run if relay is bad. now if relay clicks and pump does not run than its the pump. if you have any more questions just ask i'll help as much as i can. OLD SCHOOL.



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Suddenly problem showed, idle at 1000 rpm (know that normal is 600), traction off light, loss of power, stopped running after few mins. NO Check engine light came on!!!

You should take it to a ASE certified repair shop that has the diagnostic equipment to check it out , an I don't mean a code reader . I mean a factory scan tool that can look at engine sensor data PID'S ! It Just stopped running ? Will it start right up again or is it dead . Check for spark , that means pulling the Ignition Coil Housing an using special tool J 36012-A , there just plug wires . Install a J 26792 Spark Tester on #1 spark plug jumper wire. Connect the #4 jumper wire to a good ground. Connect the other jumper wires from the 2-3 ignition coil to the respective cylinders,Connect the J 43298 Igniton Module Tester to the ICM.
Do a fuel pressure test ! With the Factory scan tool check the idle air control valve counts , an see if it can be controlled . 220 K miles , ever have timing chain replaced ?

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You need to hook up a scanner or code reader and see what code is stored.

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Motor turns over, but wont start. it quit while driving, engine light turned on

It would be normal for the check engine light as well as the other warning lights to come on if the engine stopped running.
You could scan the computer for trouble codes if you have access to a scanner or code reader.
You would need to find out if you have spark to the plugs and fuel pressure to start the testing procedures.

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My car just dies when it warms up when it cools off it fires back up and runs fine

You'll have to figure out if it is a fuel or ignition problem.
When it quits running, quickly check for spark at the plugs and fuel pressure.
Is the check engine light on ? Have you checked for trouble codes ?
It could be a relay, the ignition module, coil, fuel pump, or a list of other things.
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1990 bmw 3 series not starting,i purchased a 316i bmw 1990 model with an m40 motor which was runnin then parked of for wen i try starting the car it swings but doest start,it has...

If an engine has timing, compression, the right amount of fuel entering the combustion chamber and an adequate spark it must start and run.

The fact it doesn't start and run means at least one of those requirements is absent. Perhaps fuel is stale, not reaching the combustion chamber or maybe there is too much fuel.

A quick check of the spark and ignition can be made by cranking the engine and using an ether spray into the intake. If the engine briefly runs it can be assumed the ignition is good enough and the problem is fuel related.

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1 Answer

1994 7.3 wont start without ether runs good after it starts turns over good after it warms up .still wont start without ether

There are two areas to check for this problem. The fuel and the spark. There is a Timer for your Glowplugs and you should hear clicking and notice the lights dimming in Synch with the clicking. This should work with your "Start" lamp in the dash.

Test one or two Glowplug wires with a Testlight and see what kind of Spark you have. If the spark is present you need to pull about half of your Glowplugs, if not all, and Test them with Battery voltage. They should be uniform in glowing and be careful not to melt them. Any Glowplug that remains cold or sluggish should be replaced. If no Spark, then check the Timer or replace it. Some models may have a Relay, check with Autozone or Oreillys or similar for parts listing.

The Glowplugs start a cold engine. In a warm engine, the Timer will not engage at a certain temperature. Engine compression will ignite the Ether if the Glowplugs do not work, but compression will not ignite a cold diesel engine.

Fuel, if you have a bleeddown in the fuel system the pump may be weak or there is a hole in the line or bad "O" rings. The Ether simply gets the engine turning fast enough to siphon the fuel and draw it back to the pump. A shop can pressure check the fuel system for leaks or use a "smoker machine" for difficult to find leaks.

I hope this helps and you are happy with the info I provided.

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Wont start, no spark anywhere

Check the spark, remove the fuse to the fuel pump and remove one of the spark plugs. Connect the plug to its lead and position it well away from the engine against the truck frame (do not hold it) and turn the engine over, check the spark. If no spark it most probably a faulty coil. Check the impedance of the spark plug leads and replace any that are much higher than the rest. My guess is that you have spark but no fuel, What?... OK this is what I think is wrong. Your pump is fine when at position 2 on the ignition switch however when you switch to position three to fire the engine the power to the fuel pump is momentarily disconnected. A leaking fuel pressure regulator or injector would drop the pressure in the fuel line and at the same time flood the engine making it impossible to start. Once you start the engine with ether the ignition is back to position 2 and the pump can make good any loss in pressure but because the intake mix is rich this will cause the engine to run rich too. A good fuel system is capable of delivering 40 - 50PSI of fuel pressure and when switched off up to 90% of this pressure should be maintained for about 5 minutes, if it cannot check out the fuel pressure regulator and injectors. The fuel pipe should be capable of filling a pint pot in about 15 seconds, if it cannot check out the fuel filter is clogged.
Hope the above gives you some pointers

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5 Answers

96 2.5 cherokee 2dr sat for a month, charged batt. , drove 4 miles, died, no power. had alt. tested, passed, got new batt., now it turns over but will not fire. Please help!

Make sure that all the wiring disturbed by the battery change was restored. Do you have the check engine light on? If so, rent a scanner and read out any code(s). Pursue the codes to repair(s). You can check the ignition by removing one spark plug wire, connect it to a spare plug and set the plug base on the engine. Have someone try the starter while you watch the plug--it should flash at regular intervals while the starter turns. If ok, let the car rest for a while, then have someone turn-on the key (don't try to start) while you listen at the fuel tank. You should hear the fuel pump run for a short time, then quit. That means the pump has built pressure and is awaiting start. If it continues to run, the pump may be toast and should be replaced. Change the fuel filter.

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