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Jim Grant's Tech Tips
92
Toyota Pick up, Hard Starting
Q: I am the owner of a
'92 Toyota Pick-up with 80,000 miles. Recently I have replaced the fuel
sending unit, fuel filter, distributor cap, rotor, ignition coil and plugs.
My problem is that the truck sometimes turns over but takes a long time
to start. When it does start it runs fine and will idle all day. I have
no fuel problem as I am getting lots into the fuel rail. I replaced the
coil on the advice of a Toyota mechanic. He felt the old one was not generating
enough spark. This still did not solve my periodic problem. My question
is: Could the igniter control box located on the top of the ignition coil
be the problem? I really am looking for some help with this and do not
want to pay the mechanic for any more than I have to............Paul
A: First,
I would not rule out fuel as a problem. Just because you have lots of
fuel available doesn't mean it's getting to the engine. If I'm not mistaken
your Toyota has a component called a cold start fuel injector. The cold
start fuel injector provides additional fuel, over and above the other
fuel injectors, for start-up when the engine is cold. The cold start fuel
injector relies on two items to activate it. A temperature sensitive thermal
switch and an electrical signal when the engine is being cranked over
for starting. A problem with the cold start injector, thermal switch or
wiring can cause difficulty when starting a cold engine, extended crank
time. A closer inspection of what it takes to start your engine should
be done before replacing any more parts.
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