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86 Mazda engine dying.


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nreves
Novice

Jul 8, 2009, 4:02 AM

Post #1 of 6 (1141 views)
86 Mazda engine dying. Sign In

i have a 1986 mazda b2000 truck with a 2.0 engine and 5 spd transmission with 146k mi. the problem im having is when i come to stop or slow down really slow the rpms go way lower than normal (~500)/engine will sometimes die on me. when i start out to work in the morning its not bad or doesnt happen, but it gets worse the longer i drive it like when it gets warmed up something goes wrong. a previous problem that i had was it wouldnt start at all but replacing the ignition switch fixed that problem. i thought it might be the fuel filter so i bought one but am currently unable to find it on the truck to replace it. any help would be appreciated.

thanks


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 8, 2009, 4:18 AM

Post #2 of 6 (1137 views)
Re: 86 Mazda engine dying. Sign In

You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nreves
Novice

Jul 8, 2009, 5:40 AM

Post #3 of 6 (1131 views)
Re: 86 Mazda engine dying. Sign In

ok thanks, now the question is where can i find a picture or diagram that shows me where that is?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 8, 2009, 5:46 AM

Post #4 of 6 (1128 views)
Re: 86 Mazda engine dying. Sign In

You know, I'm going to have to back up on that. Your engine is carbureted and I assumed it was fuel injected.

You may have something like a stuck EGR valve or just some internal carb problems. It's really going to have to be inspected.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nreves
Novice

Jul 9, 2009, 6:36 AM

Post #5 of 6 (1108 views)
Re: 86 Mazda engine dying. Sign In

so would i be able to clean the egr valve and see it that does anything? a new one is pretty spendy.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 9, 2009, 6:48 AM

Post #6 of 6 (1105 views)
Re: 86 Mazda engine dying. Sign In

Sure, just remove it and see if the pintle is fully seated. If it is, leave the vacuum hose off when you put it back on to see if anything changes.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





86 Mazda engine dying.


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