here goes, I have a 94 buick skylark. My brother in law parked it 3 years ago running fine, but it hasn't run since. Drained the gas, cleaned out tank replaced fuel pump. new plugs, new coils, new timing sensor, new spark knock sensor. new fuel injectors. motor gets fuel, has spark, won't start. thinking maybe valves stuck? put finger over spark plug holes felt compression. seems ok. what is going on with this car???
2007-01-14 18:55:24 · 12 answers · asked by jstar104 2 in Cars & Transportation ➔ Maintenance & Repairs
and yes, idiot we have a brand new battery. and starter is good and the car turns over
2007-01-14 19:06:34 · update #1
put some oil in the plug holes this will help to build up the compression this will help e-mail me for more help rsaweb414@wbs.co.za
2007-01-19 07:06:36 · answer #1 · answered by Anonymous · 0⤊ 0⤋
An engine needs three primary components to run.
1: Fuel..... It needs gasoline delivered at the correct pressure and in the correct volume (metered by the injectors) as well as sufficient air flow to properly mix the air/fuel ratio. test your fuel pressure..should be about 30-60psi depending on the system. Be sure it is getting good air flow too. Are the airways clear of obstruction?
2: Spark: Needs spark applied at the correct time. Is the distributor installed and timed correctly? Check base timing with timing light.
3: Compression, It should be about 140 psi when tested with a pressure tester. Deviation should be no more than 10% from one cylinder to the next.
A 94 would have On Board Diagnostic capabilities. If the engine is not starting, the computer should have the capability to store a trouble code pertaining to the problem. Could be a crank sensor or cam sensor failure for example. Computers can wreck havoc on the "home mechanic".
Is there a restriction in the exhaust? Too much exhaust back pressure could keep the engine from starting. I've seen rats nests in exhaust pipes block it enough to cause this.
Stuck valves could be the culprit.... but is unlikely that all the cylinders would suffer from this. Maybe one or two but the engine would still start.....
I'd need more info to more accurately handle your question...
2007-01-14 19:25:15 · answer #2 · answered by Ranger 1 · 1⤊ 0⤋
If the engine turns over, producing compression, it isn't the battery, especially since it has spark. If the plugs fire, that is they have spark, it isn't the battery, for the other respondents reply, and edification. The engine might be out of correct time. The valves would not be sticking if you have compression. Get the engine timing checked. This is the relationship of where the piston is (where the crankshaft is, is relative to the piston position) to where the camshaft lobes are that operate the valves themselves. Engine, or valve timing is CRITICAL to the engine running at all, and more so running properly. Also, be sure no critters have camped out in the air intake system, and that all of your vacuum hoses are intact.
2007-01-14 19:11:52 · answer #3 · answered by Anonymous · 1⤊ 0⤋
You may have put new fuel into it, but the old fuel was still in the Fuel Injection system. Pop the air filter out and get some starting fluid spray. While cranking, spray a bit into the intake. If it acts like it's going to start, you do have a fuel delivery problem.
If so, and if this is throttle body injection, could be the injector.
If not, try to get codes.
2007-01-14 20:20:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋
You might need a new alternator and voltage regulator. Check the battery terminals for corrosion. Check the gap on the spark plug. If the gap is not right it wont run. Look in your owners manual or a shop manual for your car. It will tell you the gap the plug should have.
2007-01-15 01:16:46 · answer #5 · answered by Chris J 3 · 0⤊ 0⤋
have you tried a small amount like 4 or 5 tablespoons of gas poured directly in the intake then start the car? also try the tps
throttle position sensor this is likely the bad part.
Da skinny from Kenny
2007-01-20 02:31:54 · answer #6 · answered by kenny m 2 · 0⤊ 0⤋
check your coils again make sure they are delfi or ac delco that does make a big difference also check firing order check your gap on plugs did you change your fuel filter just because you are getting gas doesant mean you are getting proper pressure gm's
are notorious for silly things like that which coolant is in your radiator if it is orange then do a coolant flush and have a licenced professional to check your intake manifold gasket it would also be your problem also see if your mass air flow sensor is clogged
or possibly an egr service it may need
2007-01-20 18:14:34 · answer #7 · answered by Richard S 2 · 0⤊ 0⤋
If it replace into my automobile, i might verify the spark plugs and wires. while a spark plug fouls out in a motor, it throws the stability off because of the fact one among your cylinders is failing to fire and convey capacity while that's turn is up. that usually reasons a vibration once you're sitting interior the drivers seat. there is not any way that your dad's changing of the brakes might have affected the engine in any respect.
2016-10-07 04:27:42 · answer #8 · answered by Erika 4 · 0⤊ 0⤋
squirt a small amount of oil in each cylinder this will build the compression up and it will start.
2007-01-14 22:31:22 · answer #9 · answered by duc602 7 · 0⤊ 0⤋
It is time for a reputable and certified mechanic to take at look at what the problem is.
2007-01-20 04:11:53 · answer #10 · answered by Abby 4 · 0⤊ 0⤋