Still bogging down after doing all this.

stockstang23 · Jun 9, 2005

Still bogging down after doing all this. (updated with codes)

Checked fuel pressure.

thats at 39psi vac off.

Replaced Cap and Rotor and plugs....this dident help

whats next in line, the car cruise just fine as long as i dont hit the gas to hard,

What have i got left. (this thing has a fireball ignition on it what the hell does that thing do)

could it be an 02 censor?

HISSIN50 · Jun 9, 2005

Oxygen sensor would be last on my list. Any codes?

it could be something like the TPS or EGR. The codes should help, as would a sig.

Good luck.

stockstang23 · Jun 9, 2005

EGR? please do explain sorry im not up on the part names.

this is realy weird my car has an 0bd1 port and bd2 port it's a 95 GT.

stockstang23 · Jun 9, 2005

ok i ran the codes.

171-fuel system at adaptive lmits-heated oxygen sensor 1 unable to switch bank 1.

172-lack of heated oxygen sensor switches indicates lean bank 1

176-lack of heated oxygen sensor switches indicates lean bank 2

181-Fuel system at rich adaptive limit at part throttle system lean bank 1

332-EGR Flow insufficient

543-Fuel pump secondary circut failure battery to control module

Curse · Jun 9, 2005

Have you tried driving with your MAF unplugged? If it runs better, it could be your MAF is dirty or bad. Good Luck

stockstang23 · Jun 9, 2005

even with all thouse codes it could be the MAF ?

Curse · Jun 9, 2005

Just something to try, you want to go and see what is causing all those codes be my guest.

stockstang23 · Jun 9, 2005

ok i ran it with the MAF unplugged and ill eb damned it Ran Better X10000000000 WTF?

Curse · Jun 9, 2005

The little wires inside the MAF housing should be silver in color, if they are not, then there dirty. Get a Q-tip and dip it in rubbing alcohol and very carefully clean the wires. If it still runs better without the MAF them yours might be bad.

stockstang23 · Jun 9, 2005

then i would replace it?

(for the moment is it bad running without it plugged in)

Curse · Jun 9, 2005

Yeah the car will run like crap at idle or anything under 1500rpm without the MAF plugged in. Yeah then you should try and find someone who has another MAF and try theirs and see if that is your problem.

stockstang23 · Jun 9, 2005

So what should i do about all these codes?

PurpleStripes · Jun 9, 2005

I read the codes. Unplugging the MAF will make it run better, you put it in limp-in mode so thus no more adaptive fuel data.

First, some '95 Ford and GM vehicles came with BOTH the OBDI and OBDII plugs. Only one will be functional. OBDII would be the better of course.

The EGR Code: Remove your Exhaust Gas Recirculation valve(mushroom looking thing inline with the throttle body). Check the open ports. More than likely you will find them completely closed by carbon deposits. Take a small pick or screwdriver and some good carb cleaner to the two ports. Look at the bottom of the EGR. You will seem a pintle setup(valve utilizing a piston to open and close). Anything caught in the edge or path of the pintle. Only takes a TINY piece of anything. Also, attach a small hose to the vacuum outlet on top and suck on it. Does it hold a a vacuum? If no, replace. If so, clean bottom with small amount of carb cleaner and reinstall.

Funny thing here, EGR low flow usually brings on a rich condition but the O2 sensors are reading lean. I would check for a vaccum leak. Lean means too much air or lack of fuel.

Try this: Since you have a fuel pressure gauge, take reading with key on-engine off. Without changing anything, go key off. How long does it hold a moderate amount of pressure? Should drop SLOWLY. VERY SLOWLY. If it holds no pressure at all with key off after key on, replace fuel pump. Also, check fuel volume. Believe it or not, you can have 100psi from a fuel pump and it still not be able to fill a 20oz bottle in less than an hour.

The normal pressure but no volume from the fuel pump would explain every code but the EGR...which I explained above.

Bottom line: Sounds like a serious vacuum leak or a bad fuel pump. Hope this helps.

HISSIN50 · Jun 9, 2005

the V6 94-95's had OBD-II, whereas the GT's were OBD-I. You have OBD-I and two O2 sensors (Parts stores might try to sell you 4 O2's if you need to get O2s).

I would check the engine harness and make sure the heater wire and ground are attached for the O2's.

WIth all the lean codes, vac leak would be where I would look.

The SN's have a terribly lean factory tune (too much timing, too little fuel). Do be sure to clean the MAF wire, the ACT (it is the sensor in the air inlet tube) and the ECT (pass side of the motor on the front - its electrical connector points directly at you and the radiator).

Figuring out some of the initial and known stuff might take care of the other codes (chain reaction).

You can search on the 94-95 side for MAF testing and cleaning. THose guys always have MAF issues and have some good info.

Good luck.

rustynotch · Jun 9, 2005

Same thing was happening to me after i put in 24 lbs injectors, pro-m maf and edlebrock intake manifold. At first i thought it was vacuum leak so i brought that up then i though it was fuel problem so i got a fuel pressure regulator which made the WOT bogging and induction backfires better but still did it alil at WOT so now im waiting for my 255 pump, hopefully that fixes everything, The injectors and maf were used so if this doesnt work im guess theres somethin wrong with them

stockstang23 · Jun 9, 2005

sweet it turned out to be a dirty MAF..i still have a Check engine light though...maybe the 02 sensors still?

Curse · Jun 10, 2005

stockstang23 said:
ok i ran the codes.

171-fuel system at adaptive lmits-heated oxygen sensor 1 unable to switch bank 1.

172-lack of heated oxygen sensor switches indicates lean bank 1

176-lack of heated oxygen sensor switches indicates lean bank 2

181-Fuel system at rich adaptive limit at part throttle system lean bank 1

332-EGR Flow insufficient

543-Fuel pump secondary circut failure battery to control module

Do you have a code reader, or did you go to your local part store and scan the car there? Reason I ask is some of the guy at the local parts place that scan for codes, don't really know what they are doing. Anyway depending on how much miles you got on your 02s I would think it is time for a replacment anyway. I sent you a PM.

HISSIN50 · Jun 10, 2005

stockstang23 said:
sweet it turned out to be a dirty MAF..i still have a Check engine light though...maybe the 02 sensors still?

Did you clear the KAM after you cleaned the MAF? If not, the CEL and codes will remain for a bit (even if all issues are resolved). I would clear it and note what codes come back.

Good luck.

stockstang23 · Jun 19, 2005

yup i still got 02 censor codes. but i get to thouse next.

the car still has some hesatation now....But very minor and only happens once in a while.

Curse · Jun 19, 2005

My car would hesitate randomly, turned out to be my TPS.

Still bogging down after doing all this.

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