99 Explorer 4.0 SOHC starting problem
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New User
Joined: Aug 2002
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99 Explorer 4.0 SOHC starting problem
Every now and then I crank the motor and it won't start no matter how long it cranks. After a few tries, it will start and run fine. When it turns over without starting there's a noticable vibration, different from when it turns over and starts (which is the same as always, un-noticable).
Also, a few times the motor started with a low rpm idle that was very rough. Then, after turning the key off and cranking again (and sometimes again) it will start up and run fine.
Any suggestions before I bring it in to my ford dealer and see how well the Extended Warranty that I recently purchased works?
thanks in advance.
Also, a few times the motor started with a low rpm idle that was very rough. Then, after turning the key off and cranking again (and sometimes again) it will start up and run fine.
Any suggestions before I bring it in to my ford dealer and see how well the Extended Warranty that I recently purchased works?
thanks in advance.
Senior User
Joined: Aug 2001
Posts: 380
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From: Illinois
99 Explorer 4.0 SOHC starting problem
[updated:LAST EDITED ON 09-Aug-02 AT 11:31 AM (EST)]Here are a couple things to check...
1. sprk plugs... swap some Bosh platinums in there.
2. Trottle body... get some varnish safe trottle body cleaner and give it a couple sprays.
3. MAF... get some O2 sensor safe throttle body cleaner and give it a good spray down... just mist it though. Don't spray directly at the little sensors in it, they are very fragle.
4. Get a K/N drop in air filter (not a nesesity, but nice for hp and gas mileage)
5. Also check and clean the IAC on top of the manifold with varnish safe throttle body cleaner...
Hope some of this helps...
1. sprk plugs... swap some Bosh platinums in there.
2. Trottle body... get some varnish safe trottle body cleaner and give it a couple sprays.
3. MAF... get some O2 sensor safe throttle body cleaner and give it a good spray down... just mist it though. Don't spray directly at the little sensors in it, they are very fragle.
4. Get a K/N drop in air filter (not a nesesity, but nice for hp and gas mileage)
5. Also check and clean the IAC on top of the manifold with varnish safe throttle body cleaner...
Hope some of this helps...
