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Post by treylaw on Jul 27, 2015 14:48:08 GMT -5
a month ago i had to replace the altnaor on my moms 2002 mazda protoche 5 after that happend it went to missing at random during accelaration and would not idle at all i took it back to good year they could not figure out whats wrong heres what i know needs is wrong
the exuast gasket is leaking
the fuel pump leaks a tiny bit
now they at good year cheaked spark valves compression injectors and they were all fine as wine
im at the end of my rope here i need to get this fixed bad
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Post by Mrx2002 on Jul 27, 2015 15:02:55 GMT -5
Are all vacuum lines connected? You can spray some water around where the work was performed if the engine starts sputtering you have a leak.
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Post by treylaw on Jul 27, 2015 15:11:45 GMT -5
i know theres a leak at the exuast gasket cuase at 3k rpm you can see the smoke leak out the manafold and i have not seen any lines disconected
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Post by treylaw on Jul 27, 2015 15:31:29 GMT -5
i did notice this though  |
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Post by Fox on Jul 27, 2015 15:33:25 GMT -5
My sisters Corolla was missing at random. Turned out to be a loose spark plug.
How old are the plugs and plug wires?
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Post by treylaw on Jul 27, 2015 15:39:41 GMT -5
man they told me they cheacked compreassion sparkplugs injecters and valves
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Post by 90GTVert on Jul 27, 2015 15:42:45 GMT -5
Mrx was talking about looking for vacuum leaks. Of course the exhaust and fuel leaks should be fixed, but may not be the issue.
If the check engine light is on, go to a local auto parts store and have them scan the codes. Should be a free service and they should give you a list of the codes. Depends who you get, but some of them may have helpful advice for you as well and they have the benefit of seeing it in person.
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Post by Fox on Jul 27, 2015 15:44:42 GMT -5
Well new spark plug wires and new spark plugs can do wonders. Plug wires don't last forever.
My Mazda van was missing really bad about a year ago. I thought it was major like my fuel pump or something but it turned out it just needed new plug wires and plugs and a new cap and rotor on the distributor. Pretty sure we did the fuel filter while we were in there too but that was just a preventative measure.
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Post by treylaw on Jul 27, 2015 15:50:13 GMT -5
i had codes checked before i went to good year i got wild readings everything from fuel to compresion but when they cheaked all was well my mom cant even aford to get it fixed atm
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Post by scooterpimp on Jul 27, 2015 16:11:22 GMT -5
Easy ignition test , get squirt bottle with water in it , have Mom put under load (powerbrake) & mist plug wires if it sputters ,etc, wires are failing. , o2 will act . Stupid like this at times also. Which exaust leak could be related.  if no luck , buy a Chevy!! |
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Post by iwiketuddlz on Jul 27, 2015 18:23:28 GMT -5
That's why your mom has trey law!!!! Fix her up man.... You can do it!!!!
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Post by paulmohr on Jul 27, 2015 20:27:52 GMT -5
If the exhaust leak is where the manifold mounts to the head it could be tripping the computer up. If its after it might be iffy. Unless its close to a sensor. I used to have a Grand Am that went through O2 sensors like they were twinkies. But man that quad 4 was fun to drive.
Unfortunately this is one of those thing that could be almost anything and is near impossible to diagnose over the computer. If you changed the alternator and started doing it after that, that would certainly be a good place to start. See if you can find a trouble shooting chart for that car or engine and just work your way through it. Sometimes that is the only choice you have. There is also most likely a way to get the codes and clear them without an obd checker. Most cars have a mode you can throw it into and either engine light will blink, or it will throw codes on the digital dash. You will just have to find out how to do it. Its usually a series of ignition key cycles.
A mazda forum might not be a bad idea either. You might find someone that had the problem, or a mechanic that is more familiar with that car and they can help you peg it down.
I would think if it ran fine before the alternator went out and now it doesn't that its probably nothing major. But you never know, shit breaks when it breaks. You really should fix the exhaust leak too. If its at the manifold and its bad you might run the risk of burning a valve.
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Post by treylaw on Jul 27, 2015 21:19:57 GMT -5
i may just do that paulmohr
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Post by treylaw on Jul 29, 2015 7:09:02 GMT -5
Well I guy I have noticed something and that is when it is the first start of the day it will idle fine and smoth for about 12 seconds then it will want to start dieing and missing
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Post by encephalon on Jul 30, 2015 4:53:31 GMT -5
Check the alternator like dude said. Use a volt meter. Check your battery as well. Sounds like misfiring to me, but again, hard to diagnose over the forum. If its a coil-on-plug setup it might be the "coilpacks." If not, check your spark plug wires and distributor cap and rotor.
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