need some help

86capriasc · Post by **86capriasc** » Thu Jul 10, 2008 3:05 am

I have already tried that with no results. So, onto the vacuum tester.

ASCMCLRN · Post by **ASCMCLRN** » Thu Jul 10, 2008 6:54 am

86capriasc wrote:I have already tried that with no results. So, onto the vacuum tester.

How expensive are they? Is it something that can be rented? Or perhaps you can borrow from somebody locally? Would some sort of a computer diagnostic system be able to tell were it is coming from?

Nick

86capriasc · Post by **86capriasc** » Sat Jul 19, 2008 5:50 am

Well I borrowed a vac tester from a friend. I still cannot find the leak. Of course I'm not sure of how to use the thing. Everything I have tested holds vac.
I know I have a leak somewhere though. When the car is cold I can hear a leak but cannot find it. Once warm the leak seems to be gone, but still hesitates when full throttle is applied. It is really starting to piss me off. I have probably only driven the car 400 miles this year because of it.
I have also tightened down the intake and upper plenum.
I am very confused. I always work on my vehicles and never pay someone to do it. I am thinking it might be time to finally have someone else look at it though.

I have an awesome shop just north of me( Performance-Plus.com) that I have be a regular visitor for years. Doug really knows his stuff. He has always helped me out whenever I had problem. I do buy parts from him so he is always willing to help me with advice.

I just hate to give up and have someone charge me for something I am capable of doing.

Mike

ASCMCLRN · Post by **ASCMCLRN** » Wed Jul 23, 2008 3:04 pm

86capriasc wrote:Well I borrowed a vac tester from a friend. I still cannot find the leak. Of course I'm not sure of how to use the thing. Everything I have tested holds vac.
I know I have a leak somewhere though. When the car is cold I can hear a leak but cannot find it. Once warm the leak seems to be gone, but still hesitates when full throttle is applied. It is really starting to piss me off. I have probably only driven the car 400 miles this year because of it.
I have also tightened down the intake and upper plenum.
I am very confused. I always work on my vehicles and never pay someone to do it. I am thinking it might be time to finally have someone else look at it though.

I have an awesome shop just north of me( Performance-Plus.com) that I have be a regular visitor for years. Doug really knows his stuff. He has always helped me out whenever I had problem. I do buy parts from him so he is always willing to help me with advice.

I just hate to give up and have someone charge me for something I am capable of doing.

Mike

Mike, from the looks of things you seem to have overwhelmed yourself with allot of tasks to do.

You are very talented too,

I like the wheels and the pinstriping you are looking to apply on them. The headlight covers sound cool too. Sometimes when you are in a situation like this you need to take a step back relax and think of your next move. Imo if you have someone help you it's not cause you are giving up or couldn't do it rather it is saving you more time to do other things. Especially if you feel burnt out, just git err done from the shop so you can enjoy life a lil more.

Nick

86capriasc · Post by **86capriasc** » Wed Aug 06, 2008 2:53 am

I was tinkering with the car tonight and could smell gas, so I looked all around the engine bay and could not find anything. So, I walked past the back of the car and the smell was very strong. I got the creeper out and slid under the rear of the car and noticed the fuel filter was wet. Almost got stuck though.LOL I never jacked the car up.

Now would this have any effect on why the car is bogging down at full throttle? I'm thinking yes, and will definitely change it tomorrow.

I still have the vaccum leak hissing sound but it seems to do it all the time now.
Maybe the leaky fuel filter? I also sparyed brake cleaner around the intake and all the vacuum lines and could not find any leaks.

I had pulled the egr valve and made a plate to cover the hole(no change). So I pulled the egr spacer from behind the throttle body and installed a 65mm plate (not done until tom. when I pick up the new shorter bolts to get it mounted)

So this is were I am at now, any other ideas?

Mike

86capriasc · Post by **86capriasc** » Wed Aug 06, 2008 9:08 pm

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Well nothing seemed to change today. I changed the fuel filter, and finished the TB. I can still hear the whistle in the front drivers side when cold. The bogging is still there at WOT at around 3000rpm, but if I let of slightly it takes off great.

Mike
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86capriasc · Post by **86capriasc** » Thu Aug 07, 2008 12:24 am

Ok, so now I changed the 65mm tb back to the stocker to see if it would make a difference. I drove to town and could still hear the whistle, on the way home I down shifted it to 3rd and pushed the clutch in. It freakin stalled as I was about to turn the corner. Never had that happen before.

So now the 65mm will be going back in and I will check the codes, again.

Mike

ProTouringASC · Post by **ProTouringASC** » Thu Aug 07, 2008 10:51 am

I am thinking that you are fighting two different problems. One is a possible vacuum leak, the other is the bogging problem. I do not believe the two are related.

On the vacuum leak problem, use carb cleaner instead of brake clean. Carb clean is nice and flammable where as brake clean usually is not.

Are you sure there is a vacuum leak? If all searching fails, what you hear may not be a vacuum leak after all.

Explain your bog more? You say it's at 3K, is the rpm at which it occurs consistent? Will it continue to rev, but slowly? Have you checked fuel pressure while the car is bogging down?

Shiny Side Up!
Bill

tfs2121 · Post by **tfs2121** » Thu Aug 07, 2008 1:50 pm

i dont know what type of brake clean you are using but if its not EXSTREMLY flamable you need to try a new brand.

86capriasc · Post by **86capriasc** » Thu Aug 07, 2008 4:55 pm

ProTouringASC wrote:Are you sure there is a vacuum leak? If all searching fails, what you hear may not be a vacuum leak after all.

Explain your bog more? You say it's at 3K, is the rpm at which it occurs consistent? Will it continue to rev, but slowly? Have you checked fuel pressure while the car is bogging down?

Shiny Side Up!
Bill

No, I'm not sure I have a vacuum leak it is almost starting to look like just the cai.

The bog is pretty consistent at 3000rpm at WOT, If I let out out of it will pick up right away and go. Yes it will continue to rev but slowly until it hits around 4000rpm then it takes of good. I am waiting on a fuel pressure gauge, but it is a rail mounted unit so I will not be able to watch it.

I have been reading up at sbftech.com and it looks like I have to hook up the VSS and fuel pump relay.

My next project will be a pump.

Mike

trvlnmann · Post by **trvlnmann** » Wed Aug 13, 2008 1:45 am

I had a simmilar problem with my 86' for over a year.
Mine was stalling, surging, missing when cruising, but ran like a bat out of hell at WOT.
I tried everything like you- ran codes, swapped TPS, adjusted TPS, checked for vacuum leaks. ran codes, adjusted timing, ran codes, replaced MAP, IAC, ran codes, ran codes, ran codes. I got it running better but nothing fixed it 100% .
I came to the conclusion that it had to be in the ignition system so i swapped out my MSD billet dizzy and MSD TFI module and reinstalled the stock dizzy and TFI. Now the car is running perfect.......all this time a simple 5 minute fix.
The next step for me is to contact MSD and see what the problem is with this thing.
Anyway, food for thought. if you have a spare TFI module give it a try.
Good luck, I feel your pain. keep at it you'll get it.

tfs2121 · Post by **tfs2121** » Wed Aug 13, 2008 1:48 am

MSD has GOOD and i mean GOOD tech support give them a call!

Post by **negusm** » Wed Aug 13, 2008 1:52 am

Unless you're running a highly modded car, there is no need to swap out for an MSD dizzy or distributor. The Ford Duraspark setup is extremely rock solid reliable and runs hot enough for even a decently warmed over motor.

If you go over to FEP, you'll see a fair number of people who have swapped back from their aftermarket ignitions (MSD) to the Ford units and found improvement. The ignition system is definitely one place where Ford did NOT skimp.

However, the WIRING harness is another issue altogether. Many people who claim to have improvements with an MSD system have replaced their wiring harness too. THAT weak-ass Ford wiring is probably the source of most people's frustrations!

-Mike