bdelapp
New Member
- Joined
- September 18, 2015
- Messages
- 5
- Reaction score
- 0
- Year, Model & Trim Level
- 2003 Ford Explorer
Have spent around $1,500 chasing a problem:
At start up cold idle is rough, scale of 1/10 is a 4.
As proceed down street before engine warms up it surges and records a P302 code.
Once engine warms up it runs fine.
Last August MAJOR (all OE parts) tune up, i.e plugs, coil, wires, fuel filter, air filter, complete diagnostics all performed by master mechanic at highly reliable local licensed shop.
You name it, it was replaced, including a complete 'induction service'.
Still rough idle while cold and 1 surge / dead miss before warming with one code: P302.
This year component tested and replaced #2 injector, cleaned and scoped
intake, ran complete diagnostics rechecking everything replaced August 2014, PLUS leak down, compression, fuel pump pressure and far too much to mention.
Still has rough idle when engine cold and one surge / miss on #2 causing idiot light to flash and stay on yet once engine warms up it seems to run fine.
In researching on the internet it appears this is a very common problem with the 4.0 SOHC V6 yet no general consensus of what fixes it.
Suggestions?
At start up cold idle is rough, scale of 1/10 is a 4.
As proceed down street before engine warms up it surges and records a P302 code.
Once engine warms up it runs fine.
Last August MAJOR (all OE parts) tune up, i.e plugs, coil, wires, fuel filter, air filter, complete diagnostics all performed by master mechanic at highly reliable local licensed shop.
You name it, it was replaced, including a complete 'induction service'.
Still rough idle while cold and 1 surge / dead miss before warming with one code: P302.
This year component tested and replaced #2 injector, cleaned and scoped
intake, ran complete diagnostics rechecking everything replaced August 2014, PLUS leak down, compression, fuel pump pressure and far too much to mention.
Still has rough idle when engine cold and one surge / miss on #2 causing idiot light to flash and stay on yet once engine warms up it seems to run fine.
In researching on the internet it appears this is a very common problem with the 4.0 SOHC V6 yet no general consensus of what fixes it.
Suggestions?