I have my car shaking bad and the light engine blinking. The computer said the problem was the catalytic converter. I had it changed. It was still shaking the computer said missed fire. Then I changed all the spark-plug as it was suggested by the mechanic. But the car is still shaking there after. What could be the problem?
Without seeing the vehicle i cannot say for sure but i would do a compression test first ,remove all spark plugs then test the compression ,i suspect the head gasket is blown between two cylinders which is normally 2/3 as this is the most common place where a 4 cylinder engine will blow the gasket.
Did you change plug wires also? What year make and model is it?
SOURCE: There is an a engine miss in my es 300 99 lexus
If you have coils and spark plugs then you don't have wires. From personal experience these car's misfire because of coils and BAD INJECTORS. If you replaces coils and sparks plugs you need to check injectors. Get a NOID light and check injectors pulse to make sure it good. First you must locate the cylinder that has the misfire/Missing,this can be done by using a computer/code scanner or if can be manually by disconnecting each coil and see when there is NO change in idling or shaking. What you are looking for is when you disconnect the Eugine should shake more and when you reconnect it would smooth en out. If any cylinder when disconnected the engine doesn't change that the one with the problem. Check again for spark and make sure it good. Then check that injector pulse plug off injector connector and connect it to NOID light you should get a constant flickering of NOID LIGHT. If you do then BINGO that injector is BAD. However I must say this test is on valued if you have performed a compression test on all cylinders to make sure there are no BAD/Burnted valves. This can be done with a compression guage remember the reading should NOT be more than 10PSI difference between all cylinders example of a normal reading is cylinder 1 170 psi cylinder 2 168 cylinder 3 172..... abnormal is cylinder 1 170 cylinder 2 85 cylinder 3 172 ...etc. I know this is alot of info but read through and follow these step and you'll be ASE certified by the end of this job. Good luck and thanks for using FIX YA
SOURCE: i drive a vw jetta
I had the same symptoms and found I had suffered from turbo failure and the final cost at the dealer was $3500, last VW I will ever own. I hope this isn't your trouble too, good luck
SOURCE: BMW 328 i 1997: Start up problems / Stuttering / Engine Light
change the pcv valve its under the intake manifold
SOURCE: tcs light, check engine light flashing and constant shaking..
Use an OBDII scanner, some auto parts stores will do this for you free of charge.
Codes P0300 through P0306 indicate mis-fire and you may also get codes reflecting Cat damage from running that way.
I know of one TL from this series (2000 3.2 TL) which had a warranty REPLACEMENT OF TRANSMISSION!!! free of charge and this very problem was solved. I still do not know why they were related. Talk to Acura customer relations about this.
SOURCE: 2004 VW Jetta 1.8T
Loss of power? How many miles? Plug, plug wire or ignition coil(if seperate poles) would be my guess.
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