Dear Experts, i recently bought honda accord CF4 used car with F20B SOHC engine (CF4 2.0 VTS)
I noticed that engine does not rev post 5000rpm and it started to bounce. even while i am driving engine does not pass 5000rpm and it hesitates.
Please let me know which parts i should focus and check?

 

Moved to the Accord section as this does not pertain to precision engine assembly nor machine shop machining.

Best of luck with your new purchase.

 

Verify the tach itself is not fautly. Accords are known to have a progressively lazy tach. Reads accurate below 1500rpm but progressively become worse. Use a mechanics voltmeter with tach or auxillary tach to verify that the engine is indeed cutting out at 5Krpm or if it simply is the tach itself is reading incorrectly.

 

Hi, thanks for reply. i have run full OBD test and checked the rev also. as per OBD tester RPM only goes up to 5000 not beyond that. no other issues but it always says Air temperature sensor malfunctioned. (P070). any relation between this and issue?

 

If the IAT is bust then this would limit rpms to a degree.
Being a speed density car the ECU needs at a minimum the air charge temp(IAT), throttle opening(TPS), engine temp(thermo), load(MAP), and rpm(tach) to calculate how much, how dense the air is that is being ingested into the engine for proper fuel and timing.

 

Can anyone help me to identify the A/T sensor on F20B SOHC engine? i cannot see any sensor located on intake pipe or air cleaner box.

 

thanks bro.. need to check on this. trying to locate the A/T sensor on my engine.

 

It is either on the bottom, back(firewall side), or end(opposite throttle body) of the intake manifold plenum.

 

Hi thanks, i could locate one sensor connected the end of throttle body with a single wire. typically A/T sensor comes with 2 wires right?