Super Ram Troubles
Thread Starter
Intermediate
Joined: Feb 2009
Posts: 27
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Super Ram Troubles
Hello,
I recently put a an Accel Super Ram on my 90. It ran great for a a week or two and then started having issues after my buddie checked the fuel pressure at the rail. It has a bad hesitation at low rpms. If you stomp on the pedal it sometimes backfires in the intake.
We replaced the fuel pump and injectors. New plugs and wires. New O2 sensor. Checked for vacuum leaks, couldnt find any. No CEL. No codes.
I'm hoping I dont have to remove the intake and install it again. Wasnt a very fun process.
Any help would be greatly appreciated.
Thanks,
Steve
I recently put a an Accel Super Ram on my 90. It ran great for a a week or two and then started having issues after my buddie checked the fuel pressure at the rail. It has a bad hesitation at low rpms. If you stomp on the pedal it sometimes backfires in the intake.
We replaced the fuel pump and injectors. New plugs and wires. New O2 sensor. Checked for vacuum leaks, couldnt find any. No CEL. No codes.
I'm hoping I dont have to remove the intake and install it again. Wasnt a very fun process.
Any help would be greatly appreciated.
Thanks,
Steve
Thread Starter
Intermediate
Joined: Feb 2009
Posts: 27
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I dont remember exactly what the numbers were, but when I installed the intake I also installed an adjustable fuel pressure reg from TPIS. I set the reg to what TPIS recommended.
I will try to check it again this weekend. What would you recommend setting the pressure at?
Thanks!
I will try to check it again this weekend. What would you recommend setting the pressure at?
Thanks!
Instructor
Joined: Nov 2008
Posts: 196
Likes: 3
Hello,
I recently put a an Accel Super Ram on my 90. It ran great for a a week or two and then started having issues after my buddie checked the fuel pressure at the rail. It has a bad hesitation at low rpms. If you stomp on the pedal it sometimes backfires in the intake.
Steve
I recently put a an Accel Super Ram on my 90. It ran great for a a week or two and then started having issues after my buddie checked the fuel pressure at the rail. It has a bad hesitation at low rpms. If you stomp on the pedal it sometimes backfires in the intake.
Steve
Thread Starter
Intermediate
Joined: Feb 2009
Posts: 27
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That is a good point. Is it possible that the schrader valve is restricting fuel flow? It seems highly unlikely. Isnt it similar to a valve stem? One would think that it would be leaking fuel if it was defective since the fuel pump is pushing the fuel into the fuel rail.
I could be wrong though. lol
I could be wrong though. lol
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Safety Car
Joined: Sep 2001
Posts: 4,149
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From: Glenbeulah Wi
What is the fuel pressure?
Do you have a custom chip or stock chip?
Did you check for vacuum leaks?
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
I don't know, sounds to me like something is not done right.
I like your stats though, in fact I am surprised you need help with such a simple problem being here so much
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I like your stats though, in fact I am surprised you need help with such a simple problem being here so much
splehigh's Profile
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Thanks for bringing that to my attention.
Thread Starter
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I did not see an answer to this question? A backfire in the intake indicates that it is lean. Either you have a vacuum leak, an undefined mechanical issue that is causing it to go lean, or the chip needs adjustment.
What is the fuel pressure?
Do you have a custom chip or stock chip?
Did you check for vacuum leaks?
What is the fuel pressure?
Do you have a custom chip or stock chip?
Did you check for vacuum leaks?
I know its not cranked way up. Even I know that you can ruin your injectors doing that.
Safety Car
Joined: Sep 2001
Posts: 4,149
Likes: 551
From: Glenbeulah Wi
[QUOTE=splehigh;1573345285]The car has never had a custom tune. As far as I know the computer is stock. When I checked the fule pressure it was normal, but I dont remember what the numbers were. I will check it again and post the numbers. Thanks
You will need a custom tune to fix the problem. The superram requires significant amounts of tip in fuel added to prevent a lean pop on acceleration.
I doubt you have a vacuum leak. The speed density computer system works on intake vacuum and a vacuum leak would show up as a high idle condition but the mixture would still be ok. The added air would be compansated for by the MAP sensor and the air fuel ratio would still be correct. On a MAS air car a vacuum leak could cause a lean pop but the chances are less on a speed density car.
You will need a custom tune to fix the problem. The superram requires significant amounts of tip in fuel added to prevent a lean pop on acceleration.
I doubt you have a vacuum leak. The speed density computer system works on intake vacuum and a vacuum leak would show up as a high idle condition but the mixture would still be ok. The added air would be compansated for by the MAP sensor and the air fuel ratio would still be correct. On a MAS air car a vacuum leak could cause a lean pop but the chances are less on a speed density car.
Drifting
Joined: Oct 2006
Posts: 1,934
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From: Citrus Heights California
[QUOTE=bjankuski;1573345833]The car has never had a custom tune. As far as I know the computer is stock. When I checked the fule pressure it was normal, but I dont remember what the numbers were. I will check it again and post the numbers. Thanks
You will need a custom tune to fix the problem. The superram requires significant amounts of tip in fuel added to prevent a lean pop on acceleration.
I doubt you have a vacuum leak. The speed density computer system works on intake vacuum and a vacuum leak would show up as a high idle condition but the mixture would still be ok. The added air would be compansated for by the MAP sensor and the air fuel ratio would still be correct. On a MAS air car a vacuum leak could cause a lean pop but the chances are less on a speed density car.
You will need a custom tune to fix the problem. The superram requires significant amounts of tip in fuel added to prevent a lean pop on acceleration.
I doubt you have a vacuum leak. The speed density computer system works on intake vacuum and a vacuum leak would show up as a high idle condition but the mixture would still be ok. The added air would be compansated for by the MAP sensor and the air fuel ratio would still be correct. On a MAS air car a vacuum leak could cause a lean pop but the chances are less on a speed density car.
Thread Starter
Intermediate
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PCM For Less
Hmmmm... What do you guys think about this?
Quoted from Alvin at PCM For Less:
It is normal for them to have a pumpshot type hesitation but you should
have noticed it right away. Seeing how it is a problem that has shown
up it is likely not something that can be fixed with a tune unless if
you disconnect the battery the problem goes away again.
Alvin@pcmforless.com
PCMforless of NC, INC.
(704) 307-4227
106 Performance Road
Mooresville, NC 28115
On 3/4/2010 9:10 AM, PCMforless Sales wrote:
>
Quoted from Alvin at PCM For Less:
It is normal for them to have a pumpshot type hesitation but you should
have noticed it right away. Seeing how it is a problem that has shown
up it is likely not something that can be fixed with a tune unless if
you disconnect the battery the problem goes away again.
Alvin@pcmforless.com
PCMforless of NC, INC.
(704) 307-4227
106 Performance Road
Mooresville, NC 28115
On 3/4/2010 9:10 AM, PCMforless Sales wrote:
>
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
I have ran my built 355 on the stock 90 chip a lot and never had backfires or hesitation.
I smog my 90 on the stock chip everytime. it would not pass on the rollers with this nonsense.
did you guys move the timming when messing with the shrader valve.
discoonect the map sensor?
I smog my 90 on the stock chip everytime. it would not pass on the rollers with this nonsense.
did you guys move the timming when messing with the shrader valve.
discoonect the map sensor?
