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11-22-2011, 07:16 PM
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Ford Motor Company
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Join Date: Jul 2011
Posts: 140
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Rough Idle Help!!
1999 Mazda 4x4 B3000 very rough idle happened after towing. Almost like a surge and a miss, but clears out after 1000 Rpm's. I have tried cleaning the iac and the mass, swapping coils, new plugs with correct gap, and brand new cam syncronizer. this is really stumping me, thats why i am here asking for help. I did a compression test cylinders 1- 120 psi 2- 120psi 3 120 psi 4-120 psi 5-90 psi and 6 150 psi. would these numbers causse a rough idle? next think i am going to look into is EGR valve. I have searched and searched again and could use some help!!!
thanks in advance!
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11-25-2011, 05:49 AM
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Ford Motor Company
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Join Date: Jul 2011
Posts: 140
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Guess I'm doing a set of heads, found oil in the coolant, hope there is no coolant in the oil!!
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11-28-2011, 09:26 PM
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Ford Pickup
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Join Date: Jan 2010
Posts: 105
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Re: Rough Idle Help!!
What you end up finding? a cracked head?
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sold years ago : Dark blue 1999 ford ranger flareside supercab Xlt 2wd flex fuel 3.0 auto all factory options except 4wd. Current mods include :explorer overhead console with temp display,exterior color matched painted interior dash trim and door panel trim, auto dark rear view mirror,euro tail lights,tonneau cover,1 high flow cat,cherry bomb pro muffler into 6" oval tip exited under the rear step.
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11-28-2011, 09:40 PM
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Ford Motor Company
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Join Date: Jul 2011
Posts: 140
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Haven't pulled apart yet, waiting for the new heads. I'll let you know on Sunday
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11-28-2011, 10:08 PM
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Ford Pickup
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Join Date: Jan 2010
Posts: 105
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Re: Rough Idle Help!!
I would start spraying exhaust bolts with penetrating oil daily for a few days before tear down.to make the job a little easier.but atleast if u brake a few off in the heads its no big deal since ur not reusing them.
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sold years ago : Dark blue 1999 ford ranger flareside supercab Xlt 2wd flex fuel 3.0 auto all factory options except 4wd. Current mods include :explorer overhead console with temp display,exterior color matched painted interior dash trim and door panel trim, auto dark rear view mirror,euro tail lights,tonneau cover,1 high flow cat,cherry bomb pro muffler into 6" oval tip exited under the rear step.
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11-28-2011, 10:18 PM
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checking the weather
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Join Date: Jan 2011
Posts: 2,316
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Re: Rough Idle Help!!
Could just be a vacume leak? mine was running like crap and idling awful, did all kinds of things to fix it. turned out it was only an 1in crack in a vac line. id look them over
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its a Ranger
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11-29-2011, 08:52 AM
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Ford Motor Company
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Join Date: Jul 2011
Posts: 140
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I'm not worried about the studs, got a feeling they will all break. I will most likely just hit them with an impact gun to snap the heads off.
I looked over the vac lines and it just wouldn't explain why one cylinder has 90 psi and I have oil in,my coolant. My guess is when I was towing I put big stress on that weak head gasket and it blew. Would rather have it happen now then during jetski season you know?
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12-03-2011, 03:51 PM
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Ford Motor Company
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Join Date: Jul 2011
Posts: 140
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Got it all done in a day, runs like a dream now
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12-03-2011, 08:33 PM
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Ford Pickup
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Join Date: Jan 2010
Posts: 105
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Re: Rough Idle Help!!
cool glad to hear.so headgasket or cracked head?and no pics?lol
__________________
sold years ago : Dark blue 1999 ford ranger flareside supercab Xlt 2wd flex fuel 3.0 auto all factory options except 4wd. Current mods include :explorer overhead console with temp display,exterior color matched painted interior dash trim and door panel trim, auto dark rear view mirror,euro tail lights,tonneau cover,1 high flow cat,cherry bomb pro muffler into 6" oval tip exited under the rear step.
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12-04-2011, 09:24 AM
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Ford Motor Company
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Join Date: Jul 2011
Posts: 140
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No pictures, I think it was a warped head. Didn't really go crazy on inspection but the gasket looked like poo. So anyone having rough idle with one of these 3.0, first thing to do is compression test.
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