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Comments
Also, if you shut off the car and immediately restart and continue to drive with the transmission all warmed up, does it go away for a while and then come back. I recall someone talking about a problem that sets a computer fault which is cleared by restarting.
2014 Malibu 2LT, 2015 Cruze 2LT,
Any idea about the value and how to get proofs.
Thanks.
To answer your question, sometimes it is worse after turning the car off then back on... sometimes, it doesn't start UNTIL the car is turned off then back on. I've recently started having issues with the service engine light coming on, too... says the Fan 2 relays on my ODB2, but I've replaced all of the fan relays/fuses (~$200) and it still is an issue; I cleared the message, and it came back a few hours later.
I will report back with findings; have to get the Bonne scheduled for a check-up.
Is there any correlation between the throttle position sensor and transmission?
How likely is the problem my computer?
Could it just be my tranny?
Please, help!
------------I have replaced the shift solenoid and PCS------------------ :mad:
Check all around the perimeter of the upper intake manifold. Check all rubber hoses and connectors for cracks, softness, hardening, especially on sides toward hot motor where they might deteriorate and not be visible. The vacuum leaks can cause a high idle. With the upper intake, as it warms, it expands and may be sealing a leak or crack.
You can use a carburetor spray around the areas where leaks might be with the motor idling. If there's a leak the extra hydrocarbons sucked in causes a change in idle speed and sound.
2014 Malibu 2LT, 2015 Cruze 2LT,
Whst does the color of the transmission fluid on the trans dipstick look like?
I would say I've changed my 2003 leSabre at 35K and 70K. I put in Dexron VI which is a synthetic blend that replaces the original fluid Dexron IIIe (I think that's right, check the back of the glovebox manual). That means with a drain and fill that only about 50% of the fluid is replaced. That's good. New additive cleaners to pick up stuff collecting in places where it's affecting the operation but not a totally new 100% shock of lots of additives. I do not believe in the flushes that shops like to do.
2014 Malibu 2LT, 2015 Cruze 2LT,
My mechanic replaced the ECU, ICM, manually checked the voltage levels (he had it for 2-3 weeks), and flushed the transmission fluid. After this did not fix the problem he told me that the transmission would likely need to be rebuilt eventually. After researching the issue I want to replace the crankshaft position sensor in any attempt to avoid rebuilding the tranny. Any knowledge you can share would be an enormous help as I am pretty much on my own to solve the problem.
Because it seems to struggle after shifting, I'd suspect them first.
Or, check each of the coils for corrosion in the sparkplug towers and on the prongs that insert into them underneath. Check the resistance on each and make a list. You can take the coils off one at a time easily. Sometimes coils give trouble when hot only. That's difficult to test for.
You "mechanic" replaced the ICM, or I would have you check the connector on the end of it.
When the car is doing this, stop. Turn the car off. Restart. See if it continues. I believe there was a problem with a computer control item that would reset.
I would also take off and clean my MAF sensor without touching the two wires inside. Use a cleaner for MAF from auto store. I did use a camel hair artist brush when the wires were wet.
After car has given the problem. Stop. Take off the engine cover and pull the vacuum hose off the FPR. See if liquid fuel comes out of the hose or if you get a strong gas smell out of the hose. The fuel pressure regulators sometimes leak extra fuel.
Beyond that, you might have a fuel pump pressure problem. Sometimes pumps lose pressure when the pump gets warm after use and the fuel warms after being out in the hot ambient temps. If it doesn't do this driving when it's cooler, I'd take loan of a fuel pressure gauge with a long enough hose I can tape it to the outside of the windshield with duct tape and drive. See your typical pressures and see if there's a change when you car acts up.
Beyond this I think you're at the wrong shop. The shop didn't diagnose. He hung new parts. Expensive.
I think you need an up-to-date transmission shop that can watch the pressure control module and the various solenoids in the transmission during the shifts while driving it. A dealership who does transmissions would do this with their Tech II, I believe. A quality transmission shop also will have the same or better capability.
Crankshaft position sensor?
How many miles?
Has it ever stalled for you? And then restarted easily or required a period of cooloff to restart?
I think you would have mentioned a stall problem and you didn't. I would put CPS lower on the list.
The EGR valve migh be acting up or sticking open slightly. It can be removed and checked. I believe it should have set a code for you and set the check engine light if it was not working properly.
2014 Malibu 2LT, 2015 Cruze 2LT,
Monday I went to town in it and the Check Engine light came on, and it started shifting hard and a couple of time it just didn't seem to want to go after shifting. I dropped it back off at the shop and this time they informed me it was a torque converter and solenoid fault code which made since to me because of the way it was acting. They replaced these parts.
I got the car back yesterday and all seemed well for the first 12 miles and the Check Engine light came back on, but it runs and shifting perfect. I took it straight back and they plugged it in and the transmission guy said it was the same code as before. He said he thought it hadn't had the computer reset.
Does that make sense?
He reset it and also said, "drive it and if the light comes back on it might be the throttle sensing..." or something like that. My wife took it to town today and after about 90 mile (we live way out) the light came back on again.
It runs, shifts, and drives perfect, and just had a tune up about 200 miles ago.
Does it make sense that out of the blue there is now a throttle sensor issue, or did they put in faulty parts?
If you get a good trans guy he will know about it. Yours may be an internal problem, that is more complicated. Good luck.
2002 pontiac bonneville
Is there a noise like a whine while it's doing this with the engine running?
Does it reset to operate after 10 seconds or so and then turn the key on, or does it require a long sitting time? The computer control should reset if it picked up a code in a short few seconds of OFF time for the key.
What does the fluid level look like when the transmission is warm, idling in park, level ground and you check the dipstick on the trans? It should be at the full level.
Then what does the fluid level look like while idling when the transmission has refused to engage? Running, idling in park.
If the fluid level changes during the problem occuring, that might help.
What does trans do if you put it in the 1 position for hard first gear engagement? in 2?
The FSM talks about several solenoids involved for various symptoms.
But for dropping out of 3rd/4th low fluid level or low line pressure are first on the analysis algorithm. Line pressure might be due to a worn out Pressure Control Module, an item sometimes needing replacement in 4T65e's.
2014 Malibu 2LT, 2015 Cruze 2LT,
If you contact a transmission specialist, they may tell you IF that is replaceable without removing the transmission from the vehicle. Some people have replaced the shift control pressure solenoid and I'm not sure if I've read they replaced the others without removing the transmission.
Another piece of advice would be ask them if they are replacing one of those items accessible there, if the others should be replaced. I do recall the pressure shift control solenoid was a problem through 2003. So I assume yours will lose control of the pressure adapting to shift times, giving hard shifts in protect mode until the computer is turned off and reset after 30 seconds.
I do know one shop said it's easier to remove transmission and work on it out of the car despite the time it takes. Said it was cost effective rather than trying to work in very confined space.
I believe also the 4T65e was changed some for 2003 (LeSabre) including an improvement in the cylindrical tube which does the power transfer for 4th gear. I doubt if it's a choice, but a low mileage later year transmission might be a good replacement depending on the mileage and cost for yours.
Do some research.
This may be interesting for you
https://www.youtube.com/watch?v=6b8-8FxNvTc
2014 Malibu 2LT, 2015 Cruze 2LT,
I recently bought a 1999 Pontiac Bonneville. It has started messing up and I need help figuring out a few things. #1.) Its having problems starting. I have to turn the key over and let that buzzing sound stop and then try to start it, if that doesn't work, I turn the key back off, push the gas pedal down for a second and then turn it back on and let that buzzing sound stop and it will start. I took it to advance auto to have the computer thing read and it wont read. They said it could be the fuse but my lighter works fine. So that's problem number 2.
Problem #3.) When its shifting from 2nd and into 3rd the rpms go up to 2.5 and sometimes 3 and then shift. It doesn't shift hard just hesitates.
The guy at advance said put seafoam in the gas tank and that would clean out the filter and the pump. I had a half a tank in it, put the seafoam in and filled it up. How long does it take before I know if it worked? I bought some Lucas for the transmission but I put a quart of transmission fluid in it yesterday because it was low now I dont have room for the Lucas.
Oh the old guy I bought it from 4 weeks ago said he had a new engine put in it 3 years ago and has only drove it around our small town since, it also has a new battery, starter, alternator on it because it stalled a couple of times on him and wouldn't start back for a while he said that the mechanic said it it done it again it was some kind of control modulator, it hasn't stalled just all this other stuff. Any advice, suggestions on how to fix, deal with this, anything will be appreciated
2.
BUT that resistance is read via two very fine wires that go down the steering column to the multi connector above the left foot on the firewall. The constant flexing of the tilt steering wheel, causes those two fine wires to have some of the microfine wires in the bundle break. That changes the resistance slightly as more and more break. That makes it hard for the module that reads the resistance when the key is put in and turned to ON to get the right reading.
I suspect that is starting to happen to your car. You can clean the contacts on the key with a pencil eraser. But eventually you'll have to have someone bypass the bad wires that go from the connector up the steering column. People who install theft alarms on cars have the right resistors to insert into the circuit to pretend to be the key reading the resistance.
3. I would save my money on the additives for the engine or the transmission. This may indicate the trans is going to need work some day. Dropping the pan and changing the fluid with fresh Dexron VI, the recommended replacement, along with a filter change may help. If the fluid in the trans is light pink, it's likely already been changed. One problem is folks putting in the multi-type fluid. The car came with Dexron III or IIIe fluid. But Dexron VI is the recommended fluid now. Putting in Mercon and others that are compatible with other transmissions may give a bad shift due to the adaptive shift controls in the computer. That's my opinion, even though they say on the can they are compatible with Dexron III, for instance.
The most common cause of a stall after the engine has warmed up with no codes being set in the computer and flashing the engine light or turning it on is the CPS--crankshaft position sensor. It gets weak and the magnetic field deteriorates. The heat makes it worse. When the engine cools, it starts again. This is right under the edge of the crankshaft harmonic balancer. Sometimes, a cursory test was to pour water on the sensor when the engine was off to cool it quicker than waiting for the hot engine to cool. Sometimes the wires to the CPS or the connector are the problem area.
Good luck.
2014 Malibu 2LT, 2015 Cruze 2LT,