Why does my car backrire several times before starting in the morning

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.

The battery needs to be replaced. After the first start in the morning the battery gets charged and the engine is also "hot" making it easier for the starter motor to turn it over. Therefor less current is drawn from the battery and you get a start every time. In the morning the engine is cold making it difficult to turn. The battery rested the night loosing some charge and is also cold which affects the current it can deliver at that stage. With the cold engine it is not able to turn it fast enough to get it started. A new battery will solve your problem.

Sounds like the cold start solenoid. It is designed to keep the engine running at a set RPM until it reaches a specific engine temp.

Sounds like a worn out fuel pump.

Have it scanned for error code. Idle Air system may foul up. Coolant temperature sensor giving wrong readings will confuse the ECU. It may use 'warm' setting for cold starting, thus fuel would be lean. Ideally it should use 'cold' setting which provides richer air/fuel mixture.

Check with the dealer, there is a recall on that for software.

jeeps are known for being hard to crank when cold so this is very normal!

Before you start the car tomorrow morning,open the hood and wipe down a wires,cap, all electric parts and connectors with few dry towel.

The morning moisture is a common problem for folks in cold climate.

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How many mile is on the rubber timing belt?

It need to change every 85,000 miles


A worn timing belt will off set the timing.

check harmonic balancer for slop back and forth,,,,these 3.8's have a crank posision sensor behind the balancer,that run off of the balancer,,,gthe rubber wears out and they start to flop around and timing gets messed up.../they cost around 100 bucks for a aftermarket,and if thats the problem,do yourself a favor and replace CPS while tour at it....good luck...Lee

first bump the key several time to run the fuel pump then start the car if the helps test fuel system rest pressures