I have a 2001 mitsubishi diamante and its the 3.5 v6. The car starts up and idles fine but when i try to rev it up its only rev like 400rpms and thats it. i see all my throttle linkage working perfectly. Any ideas?

02 sensor located on 2001 mitsubishi diamante YouTube

check coolant sensor and mass air flow sensor

First try replacing the spark plugs and wires. I did this is my daughters car and it solved the problem. Check CLOSE and see if there are cracks in the plug wires this fix it will cost less then 50 dollars and ANYONE can do ti. good luck,
Britts Mom

Try turning the key on and listen for the fuel pump to kick on it'll be a hum coming from the fuel tank area. If you don't hear anything then its a bad fuel pump. If you do try turning the off and on several times leaving it in the position till the humming stops then turn it off and repeat a few times then crank it if it starts then the fuel pump is weak or a clogged fuel filter which isn't allowing enough fuel to pass thru to open the injectors.

chek the oil of the transm or the filter of the transm and all the plugs are conected to the transm is electric if dosent work scan your car

The firing order is 1-2-3-4-5-6, and here is a firing order diagram to help assist you and let me know if you need any help to understand this diagram, or if you require any further assistance.

MAF or mass air flow sensor has those issues .try testing it with another one.

I could tell you, but 1st you would need to sign up for my premium assistance plan.
The cynic in me was confirmed by your reply.
thanks anyhow

thats a transmission problem, need to check your fliuid and if its ok bring it to a transmission shop for a diagnostic

Hi,.. is your car manual or auto transmission,??..maybe..if car is at full throttle /full revs,./the rev limiter will make car engine pulsate to help protect from damage