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Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 947
Experience:  16 years of experience
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My 03 matrix is jumpy at idle, i replace all plugs cleared

Customer Question

hi pearl, my 03 matrix is jumpy at idle, i replace all plugs cleared code and now have a p0300, 301 302 and 304 not sure watch else to check
JA: How many miles are on the car? What size is the engine?
Customer: 177k 1.8
JA: Tell me a bit more about what's going on so he can help you best.
Customer: it has acceleration, and the tach is jumpy as well
JA: Are you hoping to fix this yourself?
Customer: lol yes
JA: Great! What have you tried so far?
Customer: replaced all plugs, replaced 2 coil packs
JA: Is there anything else the Toyota Mechanic should be aware of about your Toyota?
Customer: also the brakes are real hard when i press down
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Toyota Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Toyota
Expert:  Boxer54 replied 1 year ago.

Thank you for trusting us with your questions. First thing I recommend is going to the brake booster. Remove the big vacuum hose from it and plug the end of it. Then, see if it doesn't start to run better.

What type and brand of spark plugs did you use?

Did it have a check engine light on before you started to perform repairs? If so, what codes?