Won't start my ion will crank but will not turnover on cold weather mornings. once i finally get it started, it will not be a problem for the rest of the day. wondering if this is a crank position sensor problem.
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I'd use a fuel pressure gage, check fuel pressure, key on, engine off, first thing in the morning, 60--66 psi, spider fuel system. If you have the spider fuel stem, that system is noted for problems.
There is a service bulletin for cold start-up problems, caused by fuel poppet valves sticking. Once you get it started, it runs fine the rest of the day. The poppet cleaning procedure shows to be a shop procedure.
cold weather seriously weakens the battery. Chemical reactions in the battery simply can't happen with the same efficiency at colder temps. Try charging the battery overnight with a 2amp "trickle charger" before a cold morning start.
Hows your oil level?When was the last oil change?May take more to get it started if oil is low or old.Oil turns to syrup in the cold.
Another possobilty is the cranking amps of the battery or the amount of power it will put out. A higher cranking amp battery will turn the engine more efficiently.
LOL repeating questions. Its your ignition switch. its a common problem with ions ( I myself have a 04 ion and had it replaced twice in 3 years) repair is around 400 dollars with labor. Just google "ion not starting in cold weather" and youll get TONS of threads. No recall either its stupid
One thing you can try since it starts good in warm weather, is to ,on a cold morning, take a hair dryer and warm up the suspect part to warm weather condition. Then try and start the car. If it start ok you have probably found the weak part.
Try cam and/or crank sensor. If crank to cam timing isn't detected properly it'll crank all day but won't start. I had similar problem on my 2.5L V6 Avenger....drove home fine, no engine light, next morning it cranked, but wouldn't start. The crank sensor was faulty.
perhaps you need a new cap and roter a new spark plug wire set. they don;t like moisture. also check to see if you have any broken or leaking vacuum hoses. the worse case senerio would be that your head gasket is leaking--at cold temps a little antifreeze will enter until everything warms up and it seals shut due to metal expanding. but since you say it's cold weather only--this probably wou;dn't be the case. good luck.
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