Date: 23 Sep 2003 21:56:59 -0700
From: (LS)
Subject: Re: 900 Turbo SE Convertible 93 Heartache

Actually, the engine stuttered... And the car seemed to have difficulty delivering fuel to the engine... More pedal requred to get less power... It seems on talking to my mechanic that two very large soundstream amps are drawing too much power for the alternator to keep up. The battery is not maintaining enough "cold cranking amps" to sufficiently run the fuel pump at high speeds and charge the battery? This is his theory at least, which means we're going to put in a Bosch 115 Amp alternator. I asked if there was anything higher because I'd like to add some additional electrical equipment, but he is reticent to do so for fear of damaging or burning out things like lights ? (hmmmm.) I am also considering upgrading my fuel injectors, and associated parts (Pressure Regulator, etc?) after reading this: Between 1985-1993, SAAB 900/9000s used the BOSCH LH fuel injection system to perform the task of delivering an accurate dose of fuel at the car's engine. The fuel injectors used were selected based on the modest power rating of the OEM engine and are not capable of delivering enough fuel to support high output applications. The rising rate regulator (above) is normally used when combating this fuel dilemma but, due to the small nozzle size, serious limitations arise when attempting to obtain an engine output over 200 bhp. At this point, a simple calculation will reveal the need for a minimum rate of 27 lbs/hr of fuel per cylinder ...anything less will not be working at optimum efficiency! This is compounded by the fact that your original injectors (21lb/hr OEM turbo OG900) may not be performing up to par due to the mileage incurred on them. All of these factors lead the SAAB tuner towards a fuel injector upgrade. Any expert opinions on these Saab Performance Parts guys? Are they the old Group 9 guys? Thanks, Griff Grunff <> wrote in message news:<bj4gpa$f6kbe$>... > LS wrote: > > > 2) I've occasionally lost power at lower speeds, with the power > > steering dying etc, I thought it might be a moisture problem because > > it happened when it was raining outside. I've replaced a couple > > batteries to no avail. Most recently I might have fixed this... The > > main hose supplying air to the engine was loose and nearly falling > > off. I'm hoping this was the 2nd issue's cause. > > More info! > > When you say you loose power, what *exactly* do you mean? Does > the engine cut out? Does it stutter? Does it run smooth but be > unable to accelerate?

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2018 - The Saab Network -
For usage guidelines, see the Mission and Purpose Page.
[Contact | Site Map | on Facebook | on Twitter | Shop Amazon via TSN | Site Donations]