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blljnt
User
Jul 25, 2011, 11:21 PM
Post #1 of 25
(2936 views)
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1988 buick century 2.5 tbi coolant fan rapidly goes on n off,eng. lite on n off too,hesitation too.i need some idea whats goin on.
even when car is cold.
(This post was edited by blljnt on Jul 25, 2011, 11:23 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 26, 2011, 8:15 AM
Post #2 of 25
(2926 views)
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Have the trouble codes read first and post them here.
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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.
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blljnt
User
Jul 26, 2011, 3:43 PM
Post #3 of 25
(2917 views)
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scanner says no power to the connector, can not communicate with vehicle
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 26, 2011, 3:56 PM
Post #4 of 25
(2913 views)
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You're going to have to get that resolved first. Check all your fuses with a test light.
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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.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 26, 2011, 4:22 PM
Post #5 of 25
(2909 views)
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Which scanner are you using? Have you tried flash code diagnostics by jumping A to B in the ALDL?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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blljnt
User
Jul 28, 2011, 6:18 AM
Post #6 of 25
(2892 views)
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solus pro,it won't flash code either.what if the issue is the ecm?it comes n goes,sometimes its ok.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 30, 2011, 9:13 AM
Post #7 of 25
(2871 views)
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You should verify that you have power and grounds to the ECM using a wiring schematic. If that is good and you cannot get flash code diagnostics to work, then you should suspect the ECM as the fault.
Don't forget to take the PROM out of the old ECM and put it into the new one if you find you have a faulty ECM.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 30, 2011, 9:15 AM)
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blljnt
User
Jul 30, 2011, 5:22 PM
Post #8 of 25
(2863 views)
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i jusi found out it runs fine after reaching operating temp.so it wouid be the electronic choke,what is that?
i've already replaced coolant sens. and i.a.c. what else is there?
(This post was edited by blljnt on Jul 30, 2011, 5:29 PM)
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blljnt
User
Jul 31, 2011, 4:21 PM
Post #10 of 25
(2849 views)
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what does the job of a choke when its cold
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 31, 2011, 4:23 PM
Post #11 of 25
(2846 views)
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A computer
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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.
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Sidom
Veteran
/ Moderator
Jul 31, 2011, 4:26 PM
Post #12 of 25
(2843 views)
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A longer Pulse width......
I would suggest following the suggestions I see in this thread......
You seem to be jumping around a bit without following any of the advise provided........
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blljnt
User
Aug 1, 2011, 5:59 AM
Post #13 of 25
(2830 views)
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i thought the symptons i'm having would lead somewhere.i don;t have the time to work on my own car,i align hotrods n classics for a livin.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 1, 2011, 6:31 AM
Post #14 of 25
(2829 views)
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If you don't have time for your own car, why do you expect us to?
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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.
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blljnt
User
Aug 1, 2011, 9:57 AM
Post #15 of 25
(2820 views)
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i was thinkin someone might know by what its doin,i'm sorry i wasted ur time.i was in the wrong forum i guess.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 1, 2011, 1:52 PM
Post #16 of 25
(2817 views)
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This is probably the one you are looking for.
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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.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 1, 2011, 7:02 PM
Post #17 of 25
(2809 views)
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Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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blljnt
User
Aug 1, 2011, 7:56 PM
Post #18 of 25
(2801 views)
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theres still some of us old folks around that can read cars not just codes,we just keep gettin fewer n fewer,sorry i bugged u.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 1, 2011, 8:17 PM
Post #19 of 25
(2796 views)
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Reading cars, I am assuming you mean using your senses to get an idea what may be wrong with a vehicle.
Due to computer fuel/ignition management you have to use not only your senses, but you have to be proficient in electrical diagnosing, theory of operation, and computer logic to be able to diagnose modern EFI vehicles and make a living doing it. You have to have a logical mindset and be able to strategize. It's a whole different ball game than when vehicles were using points and carbs.
We really try to help people on here, but sometimes its difficult because most DIY don't have those skills. Without data from testing systems on these vehicles, its very difficult to determine the cause and correction to resolve people's problems that are brought up in here.
Everyday something comes out that makes vehicles systems even more complex. What is even worse is they are not all the same in how they operate. The learning curve is very steep in the automotive trade. You can easily get left in the dust.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Sidom
Veteran
/ Moderator
Aug 1, 2011, 8:42 PM
Post #20 of 25
(2794 views)
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I won't confuse things here by adding more advise. But this really sounds like you have an electrical problem here....
Do what was suggested & get the PCM working 1st. It may or may not have anything to do with your problem but you need it working regardless....
This is an OBD I system so the DLC isn't self-powered but you shouldn't need an external source with a Solus but hook one up the connecter anyway and start there.....Get that problem fixed 1st...... If nothing else at least you will be able to use the bi-directional tests once you get the PCM working right and even on a system that old there should be some for the rad fan.....
You're not really bugging anyone, you'll know if you make anyone mad,,,,,,well other than Desi, he tends to keep things in so it's real hard to tell when you make him mad or not.
This is similiar to me asking you about my old Explorer pulling to the right & wandering.. You'd probably want me to shake down the frt end & take a close look at the radius arm bushing on the R. But when I come back with question about the shocks or maybe putting on a steering stabilizer and what is toe out on turns & scrub radius. You might answer the questions but after a while kinda just let me go on my own route..... Probably not the best analogy but close....
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 1, 2011, 8:50 PM
Post #21 of 25
(2790 views)
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The weird coolant fan cycling on and off and other odd things going on makes me believe it is ECM related Sidom.
When ever you can't get flash code diagnostics to work at the ALDL and you know the check engine light works, you have something going on with the ECM. Either you lost ignition/bat power, you lost grounds, or the ECM is faulty. You also verify power and grounds to the ECM... ALWAYS... before condemning the ECM. Those style ECMs weren't very reliable in my opinion especially on the 90-96 Buick Regal, so don't be surprised if that is your problem.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Sidom
Veteran
/ Moderator
Aug 1, 2011, 9:04 PM
Post #22 of 25
(2786 views)
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That was kinda my thinking by the fans cycling so fast...Then throw in you can't get codes with a paper clip & a S/O scanner won't communicate with it really sounds like an intermittent electrical problem.
Considering it runs good I would be leaning towards a bad ground as well or grounding/shorted power wire somewhere  considering the age of the car.
It still could be a bad PCM but I would be surprised....
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 2, 2011, 3:48 AM
Post #23 of 25
(2774 views)
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You have a poster that just wants the magical answer to his problem without having to put any effort into testing anything because he "doesn't have time". I don't have time to waste on people that are too lazy to help themselves.
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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.
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blljnt
User
Aug 2, 2011, 7:53 PM
Post #24 of 25
(2754 views)
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theres a difference between lazy n busy,i will make time for this advice,i'm a long ways from lazy!i'm 55 n been workin since 12.i said time is what i need.get off my ass. oh yeah on the explorer,try setting the caster on the rght half degree higher then the other n the camber quarter to half degree higher on the left.
too much caster on both sides will cause bump steer,check ur specs.so will a bad balljoint,they stick sometimes.even new tires can have radial pull,cross them to check that.
(This post was edited by blljnt on Aug 2, 2011, 8:32 PM)
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