so just and engine problem and 50 causes, actual,
when did car last run perfectly, never? (just bought it bad) or last decade?
even bad fuel; of car was parked for over a year.
miles on engine is what 300k?miles.
sure filters, if not in the fuel tank. both air and fuel both
and new spark plugs, no engine told
gen 5 car. yes.
2 engines then
its 20 years old, ever do a full tune up, this decade?
scan the PCM yet for DTC errors? (p03xx errors/) oops
6 new spark plugs. oem spec, for sure.
and 6 new COP boots , the old ones are JUNK (pure)
seen here
https://www.rockauto.com/en/catalog/nissan,2002,maxima,3.5l+v6,1431961,ignition,spark+plug+/+ignition+coil+boot,10150
stalls cured now ?
even partially clogged injectors, try Chevron fuel injector cleaner? to tank,? it can work ,others not.
last 2 is EGR, if it sticks open engine wants to stal.
bad ldle (too low), is stuck IAC valve.
TECH, bad engine, bad spark or bad fueling 1,2,3 in order.
we can not burn fuel(gas) lacking good spark so fueling is last,
or melted CATs and huge engine power loss.
them block exhaust flow, but is an easy vacuum test. (a tool)
low compression, lower than 150PSI on any of the 6.
if all is good, above fuel pressure is checked for spec, PSI
if low the FPR bad or pump weak
the service manual covers all PUMP ,FPR and injector leakdown and balance tests. using hand gauge. at the rail.
×