2004 Toyota Sienna 3.3L wont start, just cranks
Car will not start. Cranks all day but never fires. Have checked fuel, thats good. Checked
spark, thats good. Intake system no problems. Took to dealer they said broken timing
belt. Pulled front of motor down wasnt broken they then changed story to it jumped timing.
Replaced timing belt and water pump. Also replaced crank sensor. Still will not fire. Im out
of ideas at this point. Any help would be greatly appreciated.
Do compression test to see if you have any bent valves. I believe your model is an interference engine and if so and it jumped time you might have some bent valves.
If you got the timing right...I would be stumped too
.
Didn't think of that..but right on dandy.
front 3 cylinders between 165-180
Those seem to be fine. What about the others?
About to do those now will let you know in a few.
rear cylinders were between 180-210
Ok did a little digging. Your compression ratio is 10.8:1 on that model engine. Your proper psi operating range should be 162 psi to 216 psi per cyl. Would like to see your psi to be within 5 to 10 psi of each other and on the top side of the operating range. Although your psi appears to be low on the front bank and varying greatly from front to back bank I don't really feel that its a bent valve issue causing them to be low. Normally with bent valves you will see some with 0 psi per cyl. In my opinion your engine should still start with the psi numbers you posted.
In the beginning were you driving it and it went dead or did you just try to start it one morning and it would not start? Was it acting differently than normal the last time it did start?
Hi Dandy, My 04 sienna I was driving it and it went dead on the road and would not starts after few cranking (starts within a second and died). Few days earlier I drove it and died once and when starting back, it start fine all day. next day same routine until today.. Any ideas what the issue is, will really appreciated.
I was having the same exact issue, vehicle fell dead while running 02 sienna. had 2 issues. #1 fan belt cut through harness going to crankshaft sensor. #2 rear camshaft sensor. after I repaired harness vehicle still wouldn't start but I had injector pulse and ignition spark. replaced the rear camshaft sensor and it fired right up. check to make sure you have ignition spark and injector pulse, will have power when key is on and pulse ground when cranking. if you have both will be your cam sensors they tell the computer when to fire on # one
