I recently purchased a '91 Mazda 626 255k miles 2.2l. I have installed new plugs, fuel filter and air filter. I have also sealed up the air tube from the air filter/air meter to the intake (learned from years of driving another '91 626). I have about 35psi fuel pressure at idle, pressure goes to 42 when throttle is opened. Once I get it started it runs excellent and once warmed up it restarts well. I have installed a new temp sensor and swapped out the distributor with the one from my daily driver with no change in problem.

I'm running out of ideas. Any thoughts?

Thanks

Todd
94 Merc Sable 188k
91 Mazda 626 228k
89 Mazda B2200 177k

74 Torino Elite
70 Torino Cobra

That's a nice list of parts you threw at it but you never stated what the problem is that your trying to fix.




78 Corvette Pace Car For Sale-18k mi orig-Florida

'91 Mazda 626 Hard Starting

94 Merc Sable 188k
91 Mazda 626 228k
89 Mazda B2200 177k

74 Torino Elite
70 Torino Cobra

If that's all the effort you can put into you own problem then don't expect us to beg you for information.




78 Corvette Pace Car For Sale-18k mi orig-Florida

It cranks good I have spark but it STARTS HARD when cold, What else do you need to know?
94 Merc Sable 188k
91 Mazda 626 228k
89 Mazda B2200 177k

74 Torino Elite
70 Torino Cobra

(This post was edited by Hammer Time on Nov 4, 2009, 7:44 AM)

Is the check engine light coming on?
What does it take to get it started?
How long does it have to sit for it to be a problem?
What does it sound like when it first starts?
How old are the cap. rotor and wires?
With that mileage have you taken a compression test?

Your asking us to diagnose a problem sight unseen. We need every piece of applicable information possible. Two words in a title doesn't tell us anything.




78 Corvette Pace Car For Sale-18k mi orig-Florida

I'd have to agree with Hammer on this one. With the fuel pressure guage connected, does the pressure bleed off after turning off the ignition? Make sure that you replaced the CTS, not the engine temp. sensor. One (the CTS) is for the computer, the other is for the guage. Being a '91, it may not be possible to get live data, but would be interesting to know what the computer is seeing for temp. when cold and warm? The CTS can be tested with an ohmeter. Certain amount of resistance, at different temperatures. If you need a chart, we can supply it.
Loren
SW WA

(This post was edited by Loren Champlain Sr on Nov 4, 2009, 6:29 PM)