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Hard starting 1997 C6500 6.6 liter CAT engine

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1997 jeep Cherokee exhaust manifold glows red &starts running rough cuts off hard to start once warm took off cat still have problem thinking bad gas


Sounds like you have a timing issue(firing after TDC, bad, pushing still burning fuel mix out the exhaust), so grab a timing light and check to make sure the engine is firing at the correct time before TDC. Your Cat convertor shouldn't be a problem.

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Where is the heater o2 censor located


Check this diagram (click for zoom)...

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Hope this helps (remember to rate thsi answer).

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The engine run but do not start,there is no electricity signal at possitive coil wire


no fire at plugs no check engine on posible timing jump crank signal computer wire if this model has distributer the module could be burnt tell me more is it 3.0 liter or 2 liter 3.3 liter

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I need help finding out what engine is in my truck. i have an 86 chevy blazer k5 with the 350 5.7 liter so it says . but the guy i bought it from said it was replaced with a crate motor. my vacuum hoses...


On the chevy small block v8 the numbers will be on the left side of the engine look for a small step right at the head / block mating area. The numbers will be in the form of a ser# get that number and call a good chevy dealer and they can tell what engine you got. But any small block chevy crate engine will be a 350 or a 305. they will act the same as far as tune up and any vacuum hoses to the carb or trans. They interchange of a sort.

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I need a bit more info, just what is it doing, or not doing?

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Hard Starts, Rough Idle


Certainly possible.Key on /engine off cycles the pump for 3 secs.In a quiet place like an enclosed garage you can hear these pumps running and at this stage it might sound abnormal, louder and squeel-ish in a sense.Then can be verified by taking fuel pressure readings with a test gauge...good luck

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Sounds like cat convertors are clogged.

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For a V6 # Liter engine, you will use a galon and almost half (that is about 6 Liters of oil). I use a Toyota camry V6 3 Liter engine that shares the same engine with the Toyota 4Runner.

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Mar 21, 2009 | 1997 Toyota 4Runner

1 Answer

Hard starting


Coolant temperature sensor sounds like it went bad. It is reading that the engine is warm all the time, so the computer is not commanding additional fuel for startup. Easy and cheap fix.

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