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Old 07-25-2012, 06:58 PM   #1
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bogging like crazy

So after I changed my cap and rotor to msd I started having starting issues and problems keeping the car running.. put the stock back on and now it's bogging so bad I can't even drive it..any ideas?
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Old 07-25-2012, 06:59 PM   #2
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did you mix up the wires?
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Old 07-25-2012, 07:24 PM   #3
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Quote:
Originally Posted by dreamstang
did you mix up the wires?
No I just went out and checked looking at the diagram on a thread from here.. all appear to be in order
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Old 07-25-2012, 07:28 PM   #4
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Damn you dream!!!!!! I need a new avatar now...

---------- Post added at 07:28 PM ---------- Previous post was at 07:28 PM ----------

Which firing order did you use?
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Old 07-25-2012, 07:30 PM   #5
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that would be the only thing i can think of you could have messed up would be the firing order

you sure the diagram/firing order you looked at was for the proper engine? HO or non HO?

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---------- Post added at 07:28 PM ---------- Previous post was at 07:28 PM ----------

Which firing order did you use?
lol
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Old 07-25-2012, 07:40 PM   #6
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Quote:
Originally Posted by dreamstang
that would be the only thing i can think of you could have messed up would be the firing order

you sure the diagram/firing order you looked at was for the proper engine? HO or non HO?

---------- Post added at 07:30 PM ---------- Previous post was at 07:30 PM ----------



lol
+1 it will run on the non h/o firing order but runs like crap
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Old 07-25-2012, 07:58 PM   #7
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Quote:
Originally Posted by 90mustangLX

+1 it will run on the non h/o firing order but runs like crap
Hmm do I want to follow the 13726548 or 15426378

the body is a 94 but my engines an 86.
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Old 07-25-2012, 08:06 PM   #8
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86 is a roller motor right? sorry i forget. but i think it is, so you probably need the ho
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Old 07-25-2012, 08:13 PM   #9
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Quote:
Originally Posted by dreamstang
86 is a roller motor right? sorry i forget. but i think it is, so you probably need the ho
Yup, if I'm remembering correctly the 86 was first year for EFI rollers in mustangs.
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Old 07-25-2012, 08:15 PM   #10
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Quote:
Originally Posted by 5.0ya

Hmm do I want to follow the 13726548 or 15426378

the body is a 94 but my engines an 86.
did you use the 13726548?
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Old 07-25-2012, 08:18 PM   #11
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Quote:
Originally Posted by 90mustangLX

Yup, if I'm remembering correctly the 86 was first year for EFI rollers in mustangs.
Yah I'm pretty sure it's a roller.. I bought it thinking it had a 94 engine so I'm not to educated on this block.. so the Ho is the order beginning with 1,3,7?

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Quote:
Originally Posted by dreamstang

did you use the 13726548?
Yes sir I did.
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Old 07-25-2012, 08:19 PM   #12
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it should be right then. as long as you didnt goof one. hmmmm....
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Old 07-25-2012, 08:22 PM   #13
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Hmmmm, I would say try the other firing order but I don't know if it will matter. You can essentially make any of them number 1 on the distributor but thereis a possibility that it might be 180 out if it will start and run but run like crap.

Did you change out the dist for an msd or just the cap and rotor button?
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Old 07-25-2012, 08:28 PM   #14
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Originally Posted by 90mustangLX
Hmmmm, I would say try the other firing order but I don't know if it will matter. You can essentially make any of them number 1 on the distributor but thereis a possibility that it might be 180 out if it will start and run but run like crap.

Did you change out the dist for an msd or just the cap and rotor button?
Just the cap and rotor, haven't touched the dist at all. Also sounds like there's a whinning noice coming from that area. I'm thinking it might just need a new cap and than go from there?
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Old 07-25-2012, 08:39 PM   #15
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Quote:
Originally Posted by 5.0ya

Just the cap and rotor, haven't touched the dist at all. Also sounds like there's a whinning noice coming from that area. I'm thinking it might just need a new cap and than go from there?
It's a possibility, if your wires are going to the correct places. If anything maybe try just the MSD cap with the old rotor and vice versa and see what it does there.
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Old 07-25-2012, 10:31 PM   #16
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Same thing that's happened to mine... Im Still having problems with it lol
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Old 07-26-2012, 05:30 AM   #17
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Quote:
Originally Posted by 90mustangLX

It's a possibility, if your wires are going to the correct places. If anything maybe try just the MSD cap with the old rotor and vice versa and see what it does there.
Just dawned on me...at the time I changed it I didn't know the engine is an 86 and bought the cap n rot for a 94. If the rotor on the is still for a 94 would that be an issue?
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Old 07-26-2012, 06:37 AM   #18
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It could be, take it back and get one for an 86 and give it a shot.
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Old 07-26-2012, 04:06 PM   #19
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Quote:
Originally Posted by 90mustangLX
It could be, take it back and get one for an 86 and give it a shot.
Will try that, checking the timing and fuel pressure all on sat. Thanks for the help and will post after I finish.
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Old 07-28-2012, 12:18 PM   #20
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Quote:
Originally Posted by 90mustangLX
It could be, take it back and get one for an 86 and give it a shot.
Hey, could it be a bad TPS?
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Old 07-28-2012, 12:33 PM   #21
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Possibly, before you go buy a new one thereis a procedure in the useful info section that can show you how to test it.
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Old 07-29-2012, 11:06 AM   #22
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Originally Posted by 90mustangLX
Possibly, before you go buy a new one thereis a procedure in the useful info section that can show you how to test it.
So, cap b rot, firing order, plugs and wires all good. Took off the tps and ran good but than died.. put it back on ran boggy again.. I'm lost.
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Old 07-29-2012, 08:04 PM   #23
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You have to back track because I assume before you changed it out were you having this problem? If that is the case, maybe one of your wires are defective.
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Old 08-02-2012, 08:35 AM   #24
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You have to back track because I assume before you changed it out were you having this problem? If that is the case, maybe one of your wires are defective.
Yah I have and I'm going to start with working on fuel being the culprit. First fuel filter change.. any advice in completing the replacement?
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Old 08-03-2012, 04:05 AM   #25
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Just release the pressure before you change it out. Other than that it is pretty simple to do.
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Old 08-03-2012, 10:53 AM   #26
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Re: bogging like crazy

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Yah I have and I'm going to start with working on fuel being the culprit. First fuel filter change.. any advice in completing the replacement?
If you don't have one get a Chiltons manual for your car. They have all sorts of specs and troubleshooting procedures in them. Make sure you get one with the wiring diagrams as they can be very useful in the event of electrical problems.
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Old 08-03-2012, 06:39 PM   #27
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Originally Posted by Trojan Horse

If you don't have one get a Chiltons manual for your car. They have all sorts of specs and troubleshooting procedures in them. Make sure you get one with the wiring diagrams as they can be very useful in the event of electrical problems.
Just bought one, thanks man.
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Old 08-03-2012, 09:27 PM   #28
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Re: bogging like crazy

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Just bought one, thanks man.
Good deal.
Now you'll have all sorts of useful info right at your fingertips.
If you get confused about anything in it, just let us know and we'll help you sort it out.
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Old 08-05-2012, 12:37 AM   #29
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Try cleaning the throttle body then use cleaning foam on the mass air sensor,should fix u up if ur cap n rotor r on right. The rotor button n cap should all b same from 86 - 95 on H.O 5.0. Worst case will idle air valve sticking, have 4 fox 5.0 so really have practice with them
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Old 08-05-2012, 09:06 AM   #30
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Try cleaning the throttle body then use cleaning foam on the mass air sensor,should fix u up if ur cap n rotor r on right. The rotor button n cap should all b same from 86 - 95 on H.O 5.0. Worst case will idle air valve sticking, have 4 fox 5.0 so really have practice with them
Sounds good, I did clean the MAF thoroughly with maf cleaner and a cotton swab as well just replaced the button. Will the foam remove more than the standard maf cleaner?
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Old 08-05-2012, 12:55 PM   #31
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Yes it will, can use on idle air also should quit bogging as long as u have better than 46 psi fuel pressure
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Old 08-05-2012, 05:22 PM   #32
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Yes it will, can use on idle air also should quit bogging as long as u have better than 46 psi fuel pressure
Awesome will do. I'm going to test the voltage on my maf and iac but im new to this part of trouble shooting and am confused on meter setting and how to check it..any advice?
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Old 08-05-2012, 05:25 PM   #33
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Mine had a bogging issue over 3k at WOT.. Problem was a combo of plugs, wires, cap n button and timing. Still has a slight miss, coil is next. It's like a whole new car now though.
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Old 08-05-2012, 06:33 PM   #34
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Mine had a bogging issue over 3k at WOT.. Problem was a combo of plugs, wires, cap n button and timing. Still has a slight miss, coil is next. It's like a whole new car now though.
True, I changed every thing listed above aside from the dizzy.
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Old 08-05-2012, 06:35 PM   #35
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Have u tested the hall sensor?
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