SuperRam User question ???
Thread Starter
Instructor
Joined: Jun 2002
Posts: 135
Likes: 0
From: Lakeland FL
SuperRam User question ???
I running the superram setup 89 L98 and I have a small problem now. The car will start perfect when it is cold, but when I drive it for a while and shut it off it will not start up without cranking over & over. I also relocated the MAT senor when I installed the setup. I am thinking this might be part of the problem, moving it back is a lot of work. Just looking for some thoughts on this because the relocation of the MAT looks like a normal change.
Thread Starter
Instructor
Joined: Jun 2002
Posts: 135
Likes: 0
From: Lakeland FL
Re: (scorp508)
Stock injectors are being used. I am going to move the MAT back. I don't know why I moved it in the first place. I relocated it on a 88 TA and the same thing happened.
Drifting
Joined: Jan 2001
Posts: 1,669
Likes: 1
Re: (scorp508)
You have something wrong in the fuel system. When the engine is hot do you hear the pump turn on when you first turn on the key? What it sounds like it happening is the pump is not priming, and it is not turning on until the ECM sees that the engine is spinning then starts the pump.
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: SuperRam User question ??? (CL)
Sounds like a leaking injector letting the engine flood out, and when it's cold, well, the gas fro the injectors leaking is already evaporated out.
Either that or a bad fuel pump relay and the fuel pump not turning on until you build up oil pressure and the oil pressure switch bypasses the pump relay.
Do you smell any fuel when it is hot and won't start?
Either that or a bad fuel pump relay and the fuel pump not turning on until you build up oil pressure and the oil pressure switch bypasses the pump relay.
Do you smell any fuel when it is hot and won't start?
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Re: SuperRam User question ??? (BBA)
I ran a Super Ram for a while on my '91 Z28. I also relocated the MAT sensor and replaced it with an LT1 unit. I never had any problems.
I did the MAT relocation about 4 years before doing the Super Ram.
I did the MAT relocation about 4 years before doing the Super Ram.
Melting Slicks
Joined: Apr 2000
Posts: 2,793
Likes: 46
From: Elizabeth City, NC
Re: (CL)
I can assure you that this has nothing to do with your relocated MAT sensor.
But what you describe is a very common problem with the F body guys.
It's either a leaky set of injectors or the FP problem that snakeater described.
But what you describe is a very common problem with the F body guys.
It's either a leaky set of injectors or the FP problem that snakeater described.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. PalmerGuest
Posts: n/a
Re: (LPDesRoche)
I also have relocated and have had no problems.
It do sound like fuel pressure problem such as fuel pp ckt or injector leakdown.
Turn on the key, listen for the pump to run, turn off key 10 sec and do again. This should get the pressure up and if the car starts fine this would indicate pressure leakdown.
If it does not start fine, may be as said before a circuit problem allowing you only fuel pp operation via oil pressure switch.
This is not a MAT problem.
Burning Brakes
Joined: Feb 2000
Posts: 1,247
Likes: 2
From: Parker, Colorado, USofA
Re: SuperRam User question ??? (CL)
I've got the same problem...I was writeing it off as a problem with a heat soaked intake. After the car gets hot, the Superram gets too hot to touch. (like 100 degree days) So are there folks out there that, after driving for a bit on a really hot day...then stopping for 20-30 mintues, will have the car fire right up?
Burning Brakes
Joined: Feb 2000
Posts: 1,247
Likes: 2
From: Parker, Colorado, USofA
Re: (scorp508)
So are there folks out there that, after driving for a bit on a really hot day...then stopping for 20-30 mintues, will have the car fire right up?
Mine does.
Mine does.
Guest
Posts: n/a
Re: SuperRam User question ??? (RocketSled)
Yep, mine does too! Although, I do have a pressure leakdown problem I have never resolved. However, I can hold pressure for an hour or so. It's not a big issue, I just build it up by hitting the key a couple of times and I'm off.
Yes the SR will get warm, underhood heat is common to all during the summer.
Yes the SR will get warm, underhood heat is common to all during the summer.
Burning Brakes
Joined: Apr 2002
Posts: 1,126
Likes: 0
From: Cleveland OH
Re: SuperRam User question ??? (RocketSled)
I've got the same problem...I was writeing it off as a problem with a heat soaked intake. After the car gets hot, the Superram gets too hot to touch. (like 100 degree days) So are there folks out there that, after driving for a bit on a really hot day...then stopping for 20-30 mintues, will have the car fire right up?
Burning Brakes
Joined: Nov 2000
Posts: 1,012
Likes: 1
From: Bowie MD
Re: SuperRam User question ??? (RonRed89)
Mine fires right up after short trup in these 100 degree days. I dont seem to have this leak down condition with my accell 24 injectors. But will watch for it. I cant say that my plenumn ever gets that hot that I can't touch it. The headers are a different story though.