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Author
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Topic: CAR LACKING POWER
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totalkaos92
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Member # 5750
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posted
 
 
MY BUDDY TOOK HIS CAR TO THE SHOP BECAUSE IT WAS LAGGING ALOT OF POWER, FIRST OFF HE HAS AN 87 GT W/ AOD. THE SHOP CHANGED ALL THE SENSORS O2, T.P.S,ECT. BUT THEN THEY PUT AN EDELBROCK INTAKE, BBK T.B, AND E-303 CAM ON THE STOCK MOTOR. BEING THAT IT WAS NOT MASS AIR IT RAN LIKE SH!!!T. SO WE DID THE MASS AIR CONV, AND SET THE FIRING ORDER TO H.O AND PUT THE TIMING AT 10 DEGREES.
NOW THE CAR SOUNDS GREAT BUT IT DOES NOT PERFORM THE WAY ITS SUPPOSE TOO. IN A BREAKSTAND IT LOSES POWER AS THE RPM'S GO UP.
WAS TOLD THAT IT NEEDS TO HAVE A STALL BECAUSE OF THE CAM? ANY SUGGESTIONS? ![[Confused]](confused.gif)
Posts: 2175 | From: the bay area | Registered: Jun 2005
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porchstang
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Member # 7937
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posted
What kind of exhaust does he have? Were does it start to drop on power? When does the car stop pulling on a dig?
Posts: 114 | From: Bakersfield | Registered: Oct 2007
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MAXPSI
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Member # 8093
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posted
He could need more fuel. Without putting it on a dyno with a wide band O2 connected it would be difficult to tell.
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quote:
Just your average turbo'd Mustang 530 rwhp 550 rwtq
Posts: 120 | From: Chico, CA | Registered: Dec 2007
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Lemonade
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Member # 3692
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posted
quote:
Originally posted by porchstang:
What kind of exhaust does he have?
Catalyst or no cats?
Lems
Posts: 293 | From: San Ramon | Registered: Oct 2003
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SmokinLX
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Member # 1684
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posted
I would start with a new fuel filter & see if it pick's up.
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Dont claim power if ya cant mile per hour. 10 second AOD
Posts: 4388 | From: East Bay | Registered: Aug 2002
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Thirteen Twenty
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Member # 7961
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posted
I don't know what shop he took it to but I sure would start looking for another cuz they don't sound competent, why if a car came in with issues would they start adding perf. mods before getting it to run right stock?? That just compounds your problem. Now is the problem your mods or is the original problem the culprit??
Posts: 647 | From: union city | Registered: Oct 2007
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Jaejae5.0
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Member # 7958
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posted
is the tps set correctly?...running to rich or 2 lean maybe..fuel filter maybe...he shouldve got his engine running correctly b4 adding more parts...
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1987 notchback h/c/i 302 & 70mm turbo SOLD
2000 camaro ss cam only
Posts: 4890 | From: the combustion chamber | Registered: Oct 2007
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totalkaos92
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Member # 5750
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posted
know they should of got it running right 1st, but they jus did what he told him too.
but it loses power at approx. 4k rpm's, but it will rev up fine when its in neutral. you can stay in first gear and baby it past 4k but you cant just stomp on it.
the t.p.s could need adjustment, cause they jus put it on im sure without adjusting it.
could there be a problem in the trans? thought fuelfilter but car does not fall on its face, it just loses power slowley.
thanks guys ![[patriot]](graemlins/patriot.gif)
Posts: 2175 | From: the bay area | Registered: Jun 2005
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totalkaos92
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Member # 5750
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posted
quote:
Originally posted by Lemonade:
quote:
Originally posted by porchstang:
What kind of exhaust does he have?
Catalyst or no cats?
Lems
headers, off road h-pipe, and i think magnaflows, but with custom tips
Posts: 2175 | From: the bay area | Registered: Jun 2005
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SmokinLX
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Member # 1684
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posted
quote:
Originally posted by totalkaos92:
know they should of got it running right 1st, but they jus did what he told him too.
but it loses power at approx. 4k rpm's, but it will rev up fine when its in neutral. you can stay in first gear and baby it past 4k but you cant just stomp on it.
the t.p.s could need adjustment, cause they jus put it on im sure without adjusting it.
could there be a problem in the trans? thought fuelfilter but car does not fall on its face, it just loses power slowley.
thanks guys
Just had a problem with a clogged fuel filter that would flow fine till around 4000 rpm and then the guage would rise up to 50 & fall back down to below 40psi and then it would bounce around, unfortunatley I only have the guage mounted to the fuel regulator and did'nt realize it till I was on the dyno after I had slowly been loosing MPH at the strip and blew a couple head gasket's ![[Mad]](mad.gif) . The car would still rev to 6500 rev limiter but had slowly lost power over the last year. I have an inline pump and a supercharger so it may have band aided the symptom's as compared to Your buddies ride with no inline and less power than I have. Either way if He has never changed it or it has been a couple year's then it is timne to do it & it's only 20 buck's and takes about 10 minutes to change.
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Dont claim power if ya cant mile per hour. 10 second AOD
Posts: 4388 | From: East Bay | Registered: Aug 2002
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92stangLX
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Member # 3252
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posted
Could be a lot of things.
Are there any engine codes?
What is the fuel pressure set at? If he's not got a gauge and an adjustable regulator I would suggest getting one.
You can also try playing with the timing. Try bumping it up a bit and see what happens.
Did they change the fuel filter, plugs, plug wires, pcv, dist cap, and rotor? If not then I would change all of those.
If the car still doesn't have the power you think it should then try doing a compression test.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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92stangLX
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Member # 3252
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posted
Could be a lot of things.
Are there any engine codes?
What is the fuel pressure set at? If he's not got a gauge and an adjustable regulator I would suggest getting one.
You can also try playing with the timing. Try bumping it up a bit and see what happens.
Did they change the fuel filter, plugs, plug wires, pcv, dist cap, and rotor? If not then I would change all of those.
If the car still doesn't have the power you think it should then try doing a compression test.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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totalkaos92
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Member # 5750
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posted
quote:
Originally posted by 92stangLX:
Could be a lot of things.
Are there any engine codes?
What is the fuel pressure set at? If he's not got a gauge and an adjustable regulator I would suggest getting one.
You can also try playing with the timing. Try bumping it up a bit and see what happens.
Did they change the fuel filter, plugs, plug wires, pcv, dist cap, and rotor? If not then I would change all of those.
If the car still doesn't have the power you think it should then try doing a compression test.
fuel pressure was i belive at 38psi, timing at 10, but the rest have been changed.
only thing i can think of is the fuel filter, or the t.p.s needs adjustment.
IS A STALL REQUIRED WHEN PUTTING IN A E-CAM IN AN AOD!!?????
Posts: 2175 | From: the bay area | Registered: Jun 2005
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SmokinLX
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Member # 1684
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posted
quote:
Originally posted by totalkaos92:
quote:
Originally posted by 92stangLX:
Could be a lot of things.
Are there any engine codes?
What is the fuel pressure set at? If he's not got a gauge and an adjustable regulator I would suggest getting one.
You can also try playing with the timing. Try bumping it up a bit and see what happens.
Did they change the fuel filter, plugs, plug wires, pcv, dist cap, and rotor? If not then I would change all of those.
If the car still doesn't have the power you think it should then try doing a compression test.
fuel pressure was i belive at 38psi, timing at 10, but the rest have been changed.
only thing i can think of is the fuel filter, or the t.p.s needs adjustment.
IS A STALL REQUIRED WHEN PUTTING IN A E-CAM IN AN AOD!!?????
No You don't NEED a stall. I had one in for year's with stock stall, of course with the E cam it will help You to have a stall because it is sluggish in the low RPM's with the auto. If You are going to do it do it rite the 1st time and go with www.edgeracingconverters.com .
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Dont claim power if ya cant mile per hour. 10 second AOD
Posts: 4388 | From: East Bay | Registered: Aug 2002
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JohnB
Tech Moderator
Member # 969
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posted
When you did the MAF conversion, what ECM did you use?
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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totalkaos92
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Member # 5750
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posted
quote:
Originally posted by JohnB:
When you did the MAF conversion, what ECM did you use?
used an a9p i belive it was, and we did the conv. not to long ago.
what cha think john?
Posts: 2175 | From: the bay area | Registered: Jun 2005
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92stangLX
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Member # 3252
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posted
quote:
Originally posted by totalkaos92:
quote:
Originally posted by JohnB:
When you did the MAF conversion, what ECM did you use?
used an a9p i belive it was, and we did the conv. not to long ago.
what cha think john?
Have you tried bumping up your timing?
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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AIRFORMANCE MOBILE AUTO A/C 707
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Member # 6243
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posted
for sure try the compression test
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1993 red cobra
1973 celica chevy 406/t5/narrow 9
1969 camaro
1992 lx hatch
Posts: 666 | From: vallejo | Registered: Nov 2005
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JohnB
Tech Moderator
Member # 969
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posted
Double-check the computer ECM; make sure it is for a Auto application, as a Manual setup will cause it to run lean. Also, just a longshot...but are you sure the transmission isn't slipping?? If you can't do a brakestand with this setup...it's got issues.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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