Question about 1990 Pontiac Bonneville
Engine 3.8 V6 .Under -5 degrees Celsius it will not start. Then after a lot of tryings it starts like if nothing has happened. Then it starts all day but next morning same story.No difference if I use the electric engegine heater or not. I also have a 1988 model and that starts almost before you turn the key! Never ever failed. Not even in minus 30 degr. Celsius.
This has been done.
Computer changed-no diference, the 3 coil spark-ignation modul changed-no diff.
Fuelpump new-pressure OK
The pressure box/regulator changed & OK Canister OK. All rubber vacum hose OK no leaks.
The IAC Ok and adjusted and the EGR valve changed and works correct. New sparkplugs and new sparkwires
tempsensors new- gives right values
Throttle pos is changed and gives right Volt
MAF changed and cleaned and gives right value. Both crank and camshaft sensors changed and gives right values and the cable-connectors Ok and dry.
The oxygen sensor Ok an has a separate ground wire.
There are no intermittent faults. I also checked for broken wire from the temp sensors to the EMC-OK.
The indicator magnet fitting on the camshaft wheel is changed togehter with a new sensor on the cover.
The computer memory indicates no fault. The memory OK, (tested by simulating a fault and then it will register it)
There is absolute nothing more to exchange or adjust.
So WHY this behavior?
And yet I´m an experienced mechanical and cant fix my own car this time, well nobody else could fix eather.
Please try to figure out whats wrong before I got mad, I´m already creasy and has given up.Problem is we use car every morning to get to our jobs.
thank You in advance
My email adress is: firstname.lastname@example.org
It sounds like you have done everything, is there not a cold start sensor on the throdle body
Posted on Jan 06, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 03, 2016 | Pontiac Cars & Trucks
Feb 17, 2014 | Nissan Quest Cars & Trucks
Nov 21, 2012 | Cars & Trucks
Aug 27, 2012 | 1994 Pontiac Bonneville
Jan 26, 2011 | 2001 Audi A4
Jun 17, 2010 | 1990 Pontiac Bonneville
Mar 27, 2010 | 1990 Mitsubishi Minivan
Oct 06, 2009 | 1990 Ford Ranger SuperCab
90 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: