Greetings need some advice for the old girl
#1
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Greetings need some advice for the old girl
205,000 miles
1998 GS 400
One owner
Symptoms:
Car began hesitating after a short hwy drive. The problem is this is objective, but hitting gas feels smooth, getting to a light, shuddering begins. The warmer the car gets the worse it can be noticed. Kind of jerky.
Threw a check engine and VSC lights as I began to ditch safely as I felt it was off.
Signs:
After a tow to my mechanic I was told that the codes for all 8 cylinders showed misfire, and the VVTI.
I would include possible related events or personal opinions, but I think this way will be more subjective. I am currently searching our fine recources and have come up with much info.
Thanks to alls
1998 GS 400
One owner
Symptoms:
Car began hesitating after a short hwy drive. The problem is this is objective, but hitting gas feels smooth, getting to a light, shuddering begins. The warmer the car gets the worse it can be noticed. Kind of jerky.
Threw a check engine and VSC lights as I began to ditch safely as I felt it was off.
Signs:
After a tow to my mechanic I was told that the codes for all 8 cylinders showed misfire, and the VVTI.
I would include possible related events or personal opinions, but I think this way will be more subjective. I am currently searching our fine recources and have come up with much info.
Thanks to alls
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Other signs
Some other signs that I noticed was that when the car is cold it starts, but as I let it warm, it acts up. Vibrating scarily as soon as it engages drive or reverse as the rpm drop down
What I'm thing is the timing belt is giving me a signal, when one shouldn't ever expect to get.
The VVTi component on the engine is maybe bad.
or, A batch of bad gas.
Any help would be appreciated. I won't critisize, even if you tell me to check my tire pressure.
Thanks yall
What I'm thing is the timing belt is giving me a signal, when one shouldn't ever expect to get.
The VVTi component on the engine is maybe bad.
or, A batch of bad gas.
Any help would be appreciated. I won't critisize, even if you tell me to check my tire pressure.
Thanks yall
#3
well if it's at 205k you should have had a 2nd timing belt done by now (usually 160 or 180 is recommended). this seems to be the problem as related to your VVTi and missing issues.
also, if the car is doing this when it heats up and vibrating upon gear selection, have the tranny flushed and get some new fluid in there. A decently easy DIY if you have the right stuff. Check the tranny pan for any sludge and clean it out.
if those still dont fix the missing, clean MAF, clean Throttle Body, check plugs, check coils, check injector voltage if all of that doesn't fix it, you should take it to the shop because it's probably pretty serious.
also, if the car is doing this when it heats up and vibrating upon gear selection, have the tranny flushed and get some new fluid in there. A decently easy DIY if you have the right stuff. Check the tranny pan for any sludge and clean it out.
if those still dont fix the missing, clean MAF, clean Throttle Body, check plugs, check coils, check injector voltage if all of that doesn't fix it, you should take it to the shop because it's probably pretty serious.
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So far so good
The iso heet did great!
I am still burning the fuel and still have the check engine light, but no more shaking.
Have been trying different scenarios, no problems today
thanks everyone
I am still burning the fuel and still have the check engine light, but no more shaking.
Have been trying different scenarios, no problems today
thanks everyone
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Spoke too soon
Well I spoke too soon, at low rpm the shaking is back.
Car is going to be picked up, and be taken to the mechanic. I hear good things but have never serviced there. I don't want to give him too much info, until he has a chance to tell me what he thinks.
At the same time with 205,000 miles I will procede with:
1. timing belt
2. water pump
3. serpentine belt
Are there any other consumables that should be done?
peace,
Car is going to be picked up, and be taken to the mechanic. I hear good things but have never serviced there. I don't want to give him too much info, until he has a chance to tell me what he thinks.
At the same time with 205,000 miles I will procede with:
1. timing belt
2. water pump
3. serpentine belt
Are there any other consumables that should be done?
peace,
Last edited by mayad79; 11-16-08 at 05:19 PM.
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Electrical problem confirmed, not mechanical
Well I heard from the mechanic today that the problem is certainly an electrical, computer problem. The 4 cylinders on the drivers side are fine but not firing correctly. He is narrowing down which sensor it is, and has mentioned, as one of our colleagues here did, that air /fuel is one of them.
I will keep updating
Thanks to all
I will keep updating
Thanks to all
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well if it's at 205k you should have had a 2nd timing belt done by now (usually 160 or 180 is recommended). this seems to be the problem as related to your VVTi and missing issues.
also, if the car is doing this when it heats up and vibrating upon gear selection, have the tranny flushed and get some new fluid in there. A decently easy DIY if you have the right stuff. Check the tranny pan for any sludge and clean it out.
if those still dont fix the missing, clean MAF, clean Throttle Body, check plugs, check coils, check injector voltage if all of that doesn't fix it, you should take it to the shop because it's probably pretty serious.
also, if the car is doing this when it heats up and vibrating upon gear selection, have the tranny flushed and get some new fluid in there. A decently easy DIY if you have the right stuff. Check the tranny pan for any sludge and clean it out.
if those still dont fix the missing, clean MAF, clean Throttle Body, check plugs, check coils, check injector voltage if all of that doesn't fix it, you should take it to the shop because it's probably pretty serious.
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More info
Well the mechanic just checked the timing belt, and says that it is fine. I will change it out anyway, once I get an estimate on the electrical/computer cause.
It seems the 1sicklex's suggestion is closer to the real problem. The air/fuel sensor.
Does the VVT-I have sensor or selenoid that is part of standard maintenance?
Thanks for everyones help
It seems the 1sicklex's suggestion is closer to the real problem. The air/fuel sensor.
Does the VVT-I have sensor or selenoid that is part of standard maintenance?
Thanks for everyones help
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The verdict is in- I need a new ECU
Well folks,
The idle control seems to be the problem. The ECU is fine, but the sensors are not. The problem has yet to be confiremed, but thanks for all the help.
Peace;....
The idle control seems to be the problem. The ECU is fine, but the sensors are not. The problem has yet to be confiremed, but thanks for all the help.
Peace;....
Last edited by mayad79; 12-04-08 at 01:16 PM.
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Well there is some progress...
So,
The news is that the idle control has been replaced, the timing belt, serpentine belt, water pump.
The car is not misfiring in 4 cylinders and the ECU is fine (miscommunication), but there is a problem in one cylinder. The last issue with the cylinder is being diagnosed, but I am thinking that it may be as simple as a coil pack. I will keep this updated.....
If one coil pack is bad, should I change the rest out or anything else.
Thanks folks for all the help and the resources that are available.
The news is that the idle control has been replaced, the timing belt, serpentine belt, water pump.
The car is not misfiring in 4 cylinders and the ECU is fine (miscommunication), but there is a problem in one cylinder. The last issue with the cylinder is being diagnosed, but I am thinking that it may be as simple as a coil pack. I will keep this updated.....
If one coil pack is bad, should I change the rest out or anything else.
Thanks folks for all the help and the resources that are available.