Question about 2003 Chevrolet Malibu

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Engine stutters as rpm's increase, seems like a miss

I dont know whether it is some spark plugs missing or if it is bad gas. hard to tell the difference.

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Have the basics been done lately? A good tuneup. Plugs, maybe wires, air filter, fuel filter,etc?

Posted on Jun 29, 2009


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I just bought an 88 F150 4x4 4.9 4speed. Drove 10 miles,stopped and got 5 gal gas, continued on home. Ran perfectly. Next morn truck didn't want to start, finally did. Ran poorly, missed on 1 or 2...

probly hav a vacuum leak--if run bad at idle--fuel pump cud be failn too--test those 2 plug wires-may b bad inside--inspect distributer cap for inside corrode--w car that age unplug computer then connect again to see if issue clears----the number can mean a worn oxygen sensor-but to confirm u need a diagnostic scan w specific equip--dont go to a dealer or use a code reader

Apr 29, 2014 | 1988 Ford F 150

2 Answers

My 2000 dodge caravan was sent to garage for blown head gaskit they sent both heads to machine shop then reinstalled engine had bad miss took back said they found problem but still missing took back again...

May have not reconditioned the heads correctly may have a valve issues because the valve spring is bad or could be an injector or gaskets could be leaking on intake manifold could be a lot of different things that could have happened when they serviced the heads. Best thing to do is compression check find out the range for your compression to be at on the gague. That will tell you what’s possibly happening inside the engine. But you have to look in a chilton or haynes repair manual it will tell you what’s up when you read the compression testing gague.

Jan 11, 2018 | 2000 Dodge Caravan

1 Answer

Car wont start

could be few different problems first u need to check for fuel pressure and spark
hook a fuel pressure gauge up and see if ur getting any fuel pressure if you have no fuel pressure u either have bad pump or out of gas (don't laugh i had cars come in shop for a no start that where just out gas)
if u have fuel pressure
then check for spark
take one spark plug wire of a spark plug and hold wire about 1/4 inch away from either the spark plug or engine block if u see a spark or hear one
if you have no spark your looking at a few different possibles Bad coil, ignition module, crank sensor, etc
if you have fuel pressure and spark but still no start u need to check for injector pluse (basically computer telling fuel injectors to open)
but now i think I'm getting over your head let me know if this helps and i try to walk u threw other things if this dont help

Jan 04, 2013 | 1997 Oldsmobile Achieva

1 Answer

Im working on a 1993 cutlass ciera 3.3L it was missing pretty bad and i changed the plugs and wires also i change the fuel filter still missing but not as bad as before i only gaped the spark plugs at 040...

That 3.3 liter buick engine uses the magnavox coilpack and they are prone to failure. They will give you a weak spark and the engine will be hard starting when it gets to be 30degrees out or colder. The spark output will dissapear when put under a larger load (steping on gas 1/2 throttle or more) causing the engine to misfire at that time. those engine always ran rough at an idle so dont take that as a definate skip. you will never get that engine to run so smoothe that it doesnt wiggle a little when just standing there looking at it. due to the lack of spark and power when it looses spark when moving and giving it 1/2 throttle or so, the transmission will jump into passing gear or 3rd to 2nd(downshift) suddenly because you are giving it the command to by giving it 1/2 throttle. fix the skip and the transmission will prabably act normally. you can usually tell if the coilpack is bad by removing 2 oposing spark plug wires and using a multimeter on the ohms scale, ohm the coil posts out and you should have aproximately 15,000ohms. if you have more than 18,000 or less than 12,000ohms you definately need to replace the coil. the car could have many diffrent problems causing what you have described but my money is on the coilpack. I worked at the G.M. dealer for 15 years and have replace MANY of them.
Good luck , Scott
P.S. - Yes , regap your plugs to .060" but that will not cause he skip

Aug 24, 2011 | 1993 Oldsmobile Cutlass Ciera

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Grand am has bad miss. plugs have weak spark.seems to run on 2 cylinders.dont know if related but gas gauge started to read full when problem started.acted as if it were running out of gas before but would...

You should have a good blue spark accross plug gap if not pull your coil packs apart and check for carbon tracking or corrosion in tower assembly,you could also have a fautly modual.

Sep 25, 2009 | 1994 Pontiac Grand Am

2 Answers

2002 Ford Tarus intermittant missing cyl #3 after tuneup

I would remove one plug at a time, plug it back in wire and lay on top of engine block. Have some one crank and look for spark. Do this for each plug. If 1 is missing. You have bad wire. If two sparks are missing, then you have bad coil pack, if 3 is missing, you have two bad packs or bad module, if all cylinders are missing, then module or cranks sensor is faulty. Dont forge to change those plug wires just as often as plugs. They may look good still, but they get weak

Sep 11, 2009 | 2002 Ford Taurus

1 Answer

My 1988 mazda323 is leaking gas through the manifold

You have a miss fire. pull the spark plug wires off the plugs one at a time until one dosnt make a differance. This plug is not firing right and not burning the gas. If you get spark on the plug wire(it might shock you a little if your not carefull just hold it with one hand and dont touch the car with your other) then all you need to do is repalce the plug it self. if the wire is not sparking (if you dont hear sap sap when u pull it off) then you will need wires and maybe cap/rotor.

May 17, 2009 | 1989 Mazda 323

3 Answers

Engine is missing and shaking bad when idleing or driving slow


Mar 28, 2009 | 1990 Chevrolet Astro Extended

1 Answer

Dumps raw gas into engine

Just a few things to check. Take off the fuel filter and make sure there is no water in it. If you have put in different spark plugs than AC Delco, then change them to AC Delco. If you haven't looked at the plugs or the fuel filter, then it is way past time to replace the filter and new AC Delco spark plugs only. These places that insist that you use Bosch plugs or split fire plugs don't know ****. The Delco plugs are made especially for your engine and will out last those cheap non-working Bosch plugs.
If the fuel filter and plugs don't fix it, make sure your air filter intake isn't stopped up with a bird's nest. Happens a lot. If it still misses after new plugs, you may have a fuel injector sticking.
The bad smoke is the gas-thinned oil passing the rings and unburnt fuel smoke. The missing really bad is most likely fuel soaked spark plugs. Make sure you change the oil while changing the plugs or you will have a redo. Let us know if any of this helps. Dale

Dec 19, 2008 | 1998 Chevrolet S-10 Pickup

1 Answer

1987 cressida missing

Start with testing the injectors for pulse. Get a NOID light they sell the at almost any auto parts store remove in get plug from injector and plug the noid light into plug look for constant steady (pulse)lighting of noid light. Check all six injector on your strait 6. If all is good remove parke plug wire on at a time from cap and look for increased shaking and less when it replaced(Make sure to use wire puller with rubber insulation to avoid being zapped by spark from coil) Note cylinder with no difference or change when wire is removed. Those would be the problem cylinders. Then get a compression guage and check all cylinders for compression by removing spark plugs and attaching guage to each cylinders, make a not of each cylinder's reading. NOTE THEY SHOULD NOT BE MORE THAN 10 PSI difference in cylinders. Make note of low compression cylinders if any. If compression is good all around spark plugs are good, good ignition wires and you have good pulse pattern from you noid light. The only other problem is BAD INJECTORS and those would be the ones that didn't change when you took off the wires. I have work on these old cressida alot my self. Good Luck contact me if you need more help and if I solve your problem leave me a FIX-YA comment.

Dec 17, 2008 | 1987 Toyota Cressida

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