bad ecu?
gmc91van
10-29-2003, 01:22 PM
If anyone has any ideas to help....
My friend has a 98 s70. Here is a quick run down of his situtation:
-One day it decided not to start.
-next day started fine.
-2 months of no problems.
-brought it to a mechanic for a tune-up
they said cylinder 4,5 were missing a little.
-went to another mechanic who specializes in volvo's,
saab's, etc. to get the tune-up.
-after dropping the car off they said they could not
get the car to start, and now are saying the car needs a
whole new computer, which seems very fishy, considering
after the one incident 2 months before the car started
and ran very good.
What should he do? Has anyone had anything like this happen to them?
Any help would be cool.
My friend has a 98 s70. Here is a quick run down of his situtation:
-One day it decided not to start.
-next day started fine.
-2 months of no problems.
-brought it to a mechanic for a tune-up
they said cylinder 4,5 were missing a little.
-went to another mechanic who specializes in volvo's,
saab's, etc. to get the tune-up.
-after dropping the car off they said they could not
get the car to start, and now are saying the car needs a
whole new computer, which seems very fishy, considering
after the one incident 2 months before the car started
and ran very good.
What should he do? Has anyone had anything like this happen to them?
Any help would be cool.
V70
10-30-2003, 09:41 PM
If anyone has any ideas to help....
My friend has a 98 s70. Here is a quick run down of his situtation:
-One day it decided not to start.
-next day started fine.
-2 months of no problems.
-brought it to a mechanic for a tune-up
they said cylinder 4,5 were missing a little.
-went to another mechanic who specializes in volvo's,
saab's, etc. to get the tune-up.
-after dropping the car off they said they could not
get the car to start, and now are saying the car needs a
whole new computer, which seems very fishy, considering
after the one incident 2 months before the car started
and ran very good.
What should he do? Has anyone had anything like this happen to them?
Any help would be cool.
How many miles are on this car. If more than 100KI could see the plug wires and coil wire beeing worn and in need of replacement. Is the check engine light ON? If so what are the code/codes? But i am almost willing to bet the Engine coolant temp sensor is failing.
I would start with the engine coolant temp sensor and thermostat with new coolant. Becouse this is what i have seen befor, in over 12years i have never seen the ECU fail every two months.In most cases if the ECU fails the car wont start ever. I hope this helps V70
My friend has a 98 s70. Here is a quick run down of his situtation:
-One day it decided not to start.
-next day started fine.
-2 months of no problems.
-brought it to a mechanic for a tune-up
they said cylinder 4,5 were missing a little.
-went to another mechanic who specializes in volvo's,
saab's, etc. to get the tune-up.
-after dropping the car off they said they could not
get the car to start, and now are saying the car needs a
whole new computer, which seems very fishy, considering
after the one incident 2 months before the car started
and ran very good.
What should he do? Has anyone had anything like this happen to them?
Any help would be cool.
How many miles are on this car. If more than 100KI could see the plug wires and coil wire beeing worn and in need of replacement. Is the check engine light ON? If so what are the code/codes? But i am almost willing to bet the Engine coolant temp sensor is failing.
I would start with the engine coolant temp sensor and thermostat with new coolant. Becouse this is what i have seen befor, in over 12years i have never seen the ECU fail every two months.In most cases if the ECU fails the car wont start ever. I hope this helps V70
volvosa
06-12-2004, 04:23 PM
It seems that considering the startup problem the way you describe it, you have a recurring flooding issue. Especially after very short starts, (i.e. moving the car from the garage outside, or viceversa) these engines tend to flood up, making starting very difficult if not impossible. The way we normally dealt with this at the dealership, we'd floor the throttle and hold it completely open while cranking the car up. After a few minutes, sometimes it would do it within a minute or so... the car would start.
If you attempt this when the car does not start, do not crank the starter for more than a minute at a time. Simply stop cranking if the car does not start in a minute, and the try again in 2-5 minutes. It would be helpful to have a standby jump battery too...
This is the short term solution. The symptom generally occurs because you have deposits on the stems of the valves, in the intake area. You may find it helpful in the long term to use some engine valve cleaner additive to your fuel.
More than likely your throttle body is also clogged up/loaded with gum/unburned gas residue. A good throttle body service will probably help as well.
It would also help to occasionally drive the car at higher rpm, so the a hotter burn/airflow through the engine can occur.
The ECU module story is crap... they don't know what's wrong either, and are shooting in the dark...
Hope this helps...
If you attempt this when the car does not start, do not crank the starter for more than a minute at a time. Simply stop cranking if the car does not start in a minute, and the try again in 2-5 minutes. It would be helpful to have a standby jump battery too...
This is the short term solution. The symptom generally occurs because you have deposits on the stems of the valves, in the intake area. You may find it helpful in the long term to use some engine valve cleaner additive to your fuel.
More than likely your throttle body is also clogged up/loaded with gum/unburned gas residue. A good throttle body service will probably help as well.
It would also help to occasionally drive the car at higher rpm, so the a hotter burn/airflow through the engine can occur.
The ECU module story is crap... they don't know what's wrong either, and are shooting in the dark...
Hope this helps...
chutchin
10-07-2004, 09:32 PM
Hey,
I usually try QuikMechanic at:
http://www.ineed1.com/quikmechanic.html
I used them before, and they helped alot. It's alot cheaper than going to the shop and they don't fix it, but charge me $68 or more per hour. It's just $1 anyway, so you can't go wrong.
Chutch
I usually try QuikMechanic at:
http://www.ineed1.com/quikmechanic.html
I used them before, and they helped alot. It's alot cheaper than going to the shop and they don't fix it, but charge me $68 or more per hour. It's just $1 anyway, so you can't go wrong.
Chutch
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