2vzfe dead cylinders

[cummins359]

well i believei havedead cylinders, looking from the front of the car i believe its 2 4 6 in front? well when i pull the wires from 4 and 6 nothing changes, but when i pull2 itdiesimediately. they have spark and i get a signal from the injector plugs. what the hell? any ideas.

New timing belt 5k mi ago, new o2 sens, new ect sens, new coil, iac works, timing good,tps chks out, new afm,was running fine then while running 70 plus it just lost power and very very slowly will accelerate to 45 tops.

[white90dx]

As I posted in the other thread - check the compression (at least on those front cylinders). You may have a head gasket problem between the two cylinders.

-Charlie

[dem2757]

i second charlie's input.

the HG might be blown between 2-4 and you are just leaking compression into the other cylinder when one is fired.

[cummins359]

Well timing is good compression chks out have sparrk and inj pulse on all cyl. But 2 and 5 are the only cylinders firing. Maybe bad fuel pump? Where do u chk pressure

[cummins359]

Also cyls 2 and 5 are the last injectors on each rail

[white90dx]

What were the compression numbers?

How are you checking spark? How old is the rest of the ignition system? What brand? (plugs, wires, cap and rotor)

-Charlie

[cummins359]

Cap and rotor were replaced maybe 10k ago. From auto zone. I'm pulling wires and they arc close to an inch nice and blue to ground. I can pull the inj plugs and plug wires from cyl 1 3 4 6. And the engine never makes a change but I ppull 2 or 5 and it dies

[dem2757]

what about your plugs? ND, NGK those two brands but none other.

somethings very wrong that your opposing cylinders on opposite v banks and ends are the only ones firing.

[cummins359]

They're ngk. And it seems like its the last inj on the front rail and the last on the rear bank fuel rail. Maybe weak fuel pump or regulator. Where do I chk fuel pressure at. Theyres not a port I can find like the newer vehicles. And. I get a pulsating volt reading at the injectors so they're being told to fire . I'm just kinda stumped. And can't afford to throw parts at it .

[dem2757]

probably fuel feed. use a long screwdriver and make sure each injector is ticking. should all sound about the same

[cummins359]

Ok checked the codes again its throwing a code 42 vehicle speed sensor. Could this be the culprit. Anybody know

[cummins359]

any ideas on a code 42 causing this

[dem2757]

my car starts and runs with 42. so thats out of the question

[cummins359]

Yeah figured it was un related. I'm gonna pull the fuel system and do some pressure tests and go from there, local
Wrench a part has some good donors so might have to swap a ecu and try it