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Question
1992 Mazda B2600 I, 4X4, 5 speeds.
Will not start when the temperature is below 30 degree F; in the 40's degree may start if keep cranking; no problem when temp in the 60's and up. What cause this problem ???
(In cold temperature, will start with starting fluid pray into TBI)
Submitted: 136 days and 17 hours ago.
Category: Car
Value: $13
Status: CLOSED
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Optional Information
Year: 1992
Make: Mazda
Model: B2600i
Engine: 4 cyl. 2.6L
Already Tried:
Swapped temp sensor, TBI sensor,..., almost all sensors (from same truck of my friend),and fuel pump.
I have been living with this problem for 3 years.
Posted by
Cardoctor74
136 days and 17 hours ago.
Info Request
Ok have you checked the coolant temperature sensor when it does start in the 40 degree weather does it run rough
136 days and 17 hours ago.
Reply
No, the coolant sensor have been swapped, and no change of symtom.
Posted by
Cardoctor74
136 days and 16 hours ago.
Info Request
Ok since this is happening at only almost freezing temperatures its possible water is getting in the fuel lines and making the gas to thick have you ever used gas line antifreeze to see if it helps?
136 days and 16 hours ago.
Reply
How can the truck starts and runs normally when use starting fluid ???
Posted by
Cardoctor74
136 days and 16 hours ago.
Info Request
Does it stay running or stall as soon as you stop spraying staring fluid
136 days and 16 hours ago.
Reply
It keep running and running fine as normal, after it is able to start.
I still keep the truck, because it runs very good and strong whether it almost has 200K miles, with no major fix.
I did a lot of research, study and check the electrical wiring, but I have no clue. I even jump short the fuel motor relay, but no luck.
Posted by
Cardoctor74
136 days and 16 hours ago.
Answer
Ok have you taken a fuel pressure reading when this is happening the fuel pump can be weak and losing its prime when cold
136 days and 16 hours ago.
Reply
I did not take the fuel pressure, but I did change the fuel pump (swappe with my friend's truck).
Is there posible a tiny leak in the fuel line that caused the drop in fuel pressure? I do not suspect this for it is runs fine after start.
Any sensor, or ECM defective that cause this? I have not swap the ECM yet.
Posted by
Cardoctor74
136 days and 16 hours ago.
Answer
Could be the fuel pressure regulator also id try swapping the fuel pressure regulator first then the ecm and see if it makes adifference,if there was a leak in the fuel line you would smell and see the leak ,try the fule pressure regulator first ,also a faulty egr valve can cause this to
136 days and 16 hours ago.
Reply
The fuel pressure regulator is the one I tried to swapped at the very first , I also tried to block the fuel return line with the vise grip in intending to increase the fuel pressure, but the problem remain the same.
Posted by
Cardoctor74
136 days and 16 hours ago.
Answer
<p>Ok id swap egr valves then ecms to see it makes any difference ,also would still take that fuel pressure reading to see if the fuel pressure is good ,</p><p>.</p>
136 days and 16 hours ago.
Reply
OK, I will try EGR, and the ECM to see that will fix the problem, but I have to wait in the late fall or in the winter when the temperature below 40 F.
Accepted Answer
No problem,let me know ill still be here glad to help
Expert:
Cardoctor74
Pos. Feedback:
98.4 %
Accepts:
Answered:
7/8/2009
Tech
Ase Master Tech
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