PLEASE someone help why is my car doing this!!
07-28-12, 06:13 PM
#18
Pole Position
Thread Starter
The repair shops don't know **** none of them know about these sensors unless I go to the dealer which I'm definitely not trying to get raped so that's a no
07-28-12, 06:31 PM
#21
Pole Position
Thread Starter
Wouldn't that cause a CEL? For a wire to go bad out of nowhere sounds weird. But the only thing I can think of is when the mech was chaning the plugs he noticed a few of them were not tightened all the way and we thought that was part of the issue. Could the loose plugs have fouled the wires? I'd hate to pay to get wires don't when I just changed the plugs for it to not do anything
07-28-12, 07:07 PM
#22
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07-29-12, 05:45 AM
#24
first things first....
The absolute first thing that i would do would be to run it as low on gas as possible and see if it gets worse.it it does you have garbage in your tank.....when i would fill up i would put a bottle of fuel system drier in there and some "stab-il ethanol treatment. It sounds like you are having "ethanol gas" problems. (quote...techron gas treatment the problem still occurs but maybe not as bad as before). When you get fuel that has ethanol in it, the ethanol attracts water and can seperate with the water from the gas. if this does not help then i would:
1. unplug and inspect the wires and plugs on all your coil packs.
2. remove and inspect you intake system. (check vacuum lines for leaks)
3. with intake off motor cold start engine and inspect tps/throttle body.
4. spray carb cleaner around intake manifold to check for leaks. (if there is a leak the engine will race a little when you spray carb cleaner near the leak)
5. check pcv valve for proper operation(or just buy a new one they are cheap)
6. check vvti oil filter screen and clean
7. check fuel pressure
8. check for low voltage and bad grounds.
7. disconnect battery for 10 mins or so and reset the comptuer.
if none of this works its off to the dealer or a local toyota repair specialist.
The absolute first thing that i would do would be to run it as low on gas as possible and see if it gets worse.it it does you have garbage in your tank.....when i would fill up i would put a bottle of fuel system drier in there and some "stab-il ethanol treatment. It sounds like you are having "ethanol gas" problems. (quote...techron gas treatment the problem still occurs but maybe not as bad as before). When you get fuel that has ethanol in it, the ethanol attracts water and can seperate with the water from the gas. if this does not help then i would:
1. unplug and inspect the wires and plugs on all your coil packs.
2. remove and inspect you intake system. (check vacuum lines for leaks)
3. with intake off motor cold start engine and inspect tps/throttle body.
4. spray carb cleaner around intake manifold to check for leaks. (if there is a leak the engine will race a little when you spray carb cleaner near the leak)
5. check pcv valve for proper operation(or just buy a new one they are cheap)
6. check vvti oil filter screen and clean
7. check fuel pressure
8. check for low voltage and bad grounds.
7. disconnect battery for 10 mins or so and reset the comptuer.
if none of this works its off to the dealer or a local toyota repair specialist.
07-29-12, 08:42 AM
#25
Yeah, the fact that you have no codes is an issue. I had an almost identical problem and did like you with spark plugs, MAF sensor etc, took to the Lexus dealer and they couldn't find out what was wrong, told me they needed two more hours to diagnose which would be $200. Turned out to be the fuel pump, but I had a check engine light though saying bank 1 is lean. Take it to Autozone, they might be able to see if there is a pending code.
07-29-12, 11:37 AM
#26
Pole Position
Thread Starter
Yea I WISSSSH I had a CEL so I didn't need to go thru this! How long did ur problem persist before the CEL came on? Because my problem just started last month so maybe it needs to get worse or something
07-29-12, 11:41 AM
#27
Pole Position
Thread Starter
first things first....
The absolute first thing that i would do would be to run it as low on gas as possible and see if it gets worse.it it does you have garbage in your tank.....when i would fill up i would put a bottle of fuel system drier in there and some "stab-il ethanol treatment. It sounds like you are having "ethanol gas" problems. (quote...techron gas treatment the problem still occurs but maybe not as bad as before). When you get fuel that has ethanol in it, the ethanol attracts water and can seperate with the water from the gas. if this does not help then i would:
1. unplug and inspect the wires and plugs on all your coil packs.
2. remove and inspect you intake system. (check vacuum lines for leaks)
3. with intake off motor cold start engine and inspect tps/throttle body.
4. spray carb cleaner around intake manifold to check for leaks. (if there is a leak the engine will race a little when you spray carb cleaner near the leak)
5. check pcv valve for proper operation(or just buy a new one they are cheap)
6. check vvti oil filter screen and clean
7. check fuel pressure
8. check for low voltage and bad grounds.
7. disconnect battery for 10 mins or so and reset the comptuer.
if none of this works its off to the dealer or a local toyota repair specialist.
The absolute first thing that i would do would be to run it as low on gas as possible and see if it gets worse.it it does you have garbage in your tank.....when i would fill up i would put a bottle of fuel system drier in there and some "stab-il ethanol treatment. It sounds like you are having "ethanol gas" problems. (quote...techron gas treatment the problem still occurs but maybe not as bad as before). When you get fuel that has ethanol in it, the ethanol attracts water and can seperate with the water from the gas. if this does not help then i would:
1. unplug and inspect the wires and plugs on all your coil packs.
2. remove and inspect you intake system. (check vacuum lines for leaks)
3. with intake off motor cold start engine and inspect tps/throttle body.
4. spray carb cleaner around intake manifold to check for leaks. (if there is a leak the engine will race a little when you spray carb cleaner near the leak)
5. check pcv valve for proper operation(or just buy a new one they are cheap)
6. check vvti oil filter screen and clean
7. check fuel pressure
8. check for low voltage and bad grounds.
7. disconnect battery for 10 mins or so and reset the comptuer.
if none of this works its off to the dealer or a local toyota repair specialist.
07-29-12, 12:39 PM
#28
Pole Position
Thread Starter
And I've reset the ECU by unplugging the battery a few hours which made the car drive real nice at first but after a day or so sitting overnight the same problem occurs
07-29-12, 01:06 PM
#30
I have the same problem. Neither my mechanic or I can figure it out. It's only when I first start it up in the morning. I have an 02 430, it just started a few months ago and I've done all the same things you've done. 
EDIT: I have read that a bad battery can cause weird things in our cars - it might be worth trying that as a diagnostic step next.
EDIT: I have read that a bad battery can cause weird things in our cars - it might be worth trying that as a diagnostic step next.