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just picked up a 95 5.0 5 spd. makes power up to about 3k then it stumbles. and gradually picks up. had codes come up saying 172,176 ego not opening/lean and 181,189 cruise limit/lean. changed fuel filter and plugs and no more check engine light, but lacks power still.

Submitted: 19 days and 8 hours ago.

Category: Ford

Value: $15

Status: AWAITING CUSTOMER ACTION

Year : 1995
Make : Ford
Model: gt
Engine: 5.0

Already Tried:
changed plugs, fuel filter and checked fuel pressure(key on motor off/ key on motor on)

Posted by kevin 19 days and 8 hours ago.

Info Request

Does the car have catalatyc converters?

19 days and 8 hours ago.

Reply

yes

Posted by kevin 19 days and 8 hours ago.

Info Request

This symptom can be caused by plugged cats but first, what were your fuel pressure readings, do you hear any noise comming from the exhaust, can you try hitting the cats with a rubber mallet to see if it sounds like there is a rattle?

19 days and 8 hours ago.

Reply

fuel pressure was 31 with motor on. key on /motor off went to 40 then dropped to 0 right away.sounds like something rattling when driving, on the throttle

Posted by kevin 19 days and 7 hours ago.

Info Request

The fuel pressure should only drop to zero when you relieve the pressure from the tester gauge, if its dropping to zero immiediatly after it hits 40 psi that means that you have either a stuck open fuel injector or a leak somewhere else in the system, the injectors are activated open in pulses by the pcm, when you turn the key on they should open for short time but then close and hold pressure in the fuel rail, so its possible that there is more than one problem causing your driveability issue, a stuck injector most commonly causes a misfire, I still think that there is an issue with the cats also, is your fuel pressure tester accurate? Can you hit the cats to see if you hear something rattling/loose inside of them?

19 days and 7 hours ago.

Reply

pressure tester is accurate. no i cant hit the cats. cars too low. could the fuel pump be going bad?

Posted by kevin 19 days and 6 hours ago.

Info Request

To find out you need to drive and monitor the fuel pressure and record the readings you get when the symptom is at its worst, the pressure should fluctuate between 30 to 50 psi.

19 days and 6 hours ago.

Reply

ok

Posted by kevin 19 days and 6 hours ago.

Info Request

Let me know what you come up with and we can go from there, thanks

17 days and 9 hours ago.

Reply

Relist: Other How many cats should my 95 5.0 5spd have on it? For it to pass smog?

Posted by kevin 17 days and 4 hours ago.

Answer

2 cats, you can buy good aftermarket high flow cats from summit racing or mustangs unlimited for around $350

17 days and 3 hours ago.

Reply

ok. there are 4 on it right now

Answer

Yes, thats how many they come with stock , but its alot more expensive to by a H-pipe with four cats plus you get better performance with only having two.

Accepts:
Expert:	kevin
Pos. Feedback:	100.0 %
Answered:	11/6/2009

Ford Mechanic

7 years

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Question

just picked up a 95 5.0 5 spd. makes power up to about 3k then it stumbles. and gradually picks up. had codes come up saying 172,176 ego not opening/lean and 181,189 cruise limit/lean. changed fuel filter and plugs and no more check engine light, but lacks power still.

Optional Information

Year : 1995Make : FordModel: gtEngine: 5.0 Already Tried: changed plugs, fuel filter and checked fuel pressure(key on motor off/ key on motor on)

Info Request

Does the car have catalatyc converters?

Reply

yes

Info Request

This symptom can be caused by plugged cats but first, what were your fuel pressure readings, do you hear any noise comming from the exhaust, can you try hitting the cats with a rubber mallet to see if it sounds like there is a rattle?

Reply

fuel pressure was 31 with motor on. key on /motor off went to 40 then dropped to 0 right away.sounds like something rattling when driving, on the throttle

Info Request

Reply

pressure tester is accurate. no i cant hit the cats. cars too low. could the fuel pump be going bad?

Info Request

To find out you need to drive and monitor the fuel pressure and record the readings you get when the symptom is at its worst, the pressure should fluctuate between 30 to 50 psi.

Reply

ok

Info Request

Let me know what you come up with and we can go from there, thanks

Reply

Relist: Other How many cats should my 95 5.0 5spd have on it? For it to pass smog?

Answer

2 cats, you can buy good aftermarket high flow cats from summit racing or mustangs unlimited for around $350

Reply

ok. there are 4 on it right now

Answer

Yes, thats how many they come with stock , but its alot more expensive to by a H-pipe with four cats plus you get better performance with only having two.

Related Ford Questions

Year : 1995
Make : Ford
Model: gt
Engine: 5.0

Already Tried:
changed plugs, fuel filter and checked fuel pressure(key on motor off/ key on motor on)