2002 Tundra, replaced battery, alternator was checked and is good, but engine cuts out when I slow down/break, and battery light comes on. Starts back up easily.
stop guessing, please.$$$$$
hot or cold engine, or both.
ever heard of engine stall? the rpm drops below 800 and stalls?
the engine rpm is KEY
post all symptoms, and we can fix it.
so far all i have is the hint of a stall or engine running at 300 rpm.
the alternator don't work at 300 rpm. at stall or near that.
your car dont have a tachometer? if it has one learn to watch it.
stalls are complex.
The engine PCM controls idle speed and Regulation at all times.
and is the LAST thing to work right, in EFI.
think of a juggler of bowling pins, a delicate balancing act.
so if the pins are slippery , he drop one, so easy.
EFI is Electronic fuel Injection (makes spark too , on gas engines..)
on EFI, idle fails (low) 800 is normal hot block, (look up yours. no engine options or size or cylinder counts stated)
the low RPM is caused by. many things. (i have a list of 50) so skip that....
1: too rich , too lean,. misfiring, DTCs set, ever scan the PCM YET?
2: EGR sticking open(clean it)
3: ISC (IAC electric) stuck closed, (again clean it)
4: never did the 60k mile tune up? if you did it would run ,if not the person doing it would tell you why it dont run right or even fix. it.
during a tune up , we check the ISC and EGR for filth and clean them.
now ill do the marco (physics answer)
1: bad engine, engine compression bad on 1 or more cylinders.
2: bad spark , tuneups fix this 99% of time, and work
3: bad fueling. (vastly complex. but most times bad inputs to ECU)
there are exceptions, but all land on #1 (stops engine from pumping air)
Dec 30, 2013 |
2002 Toyota Tundra