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2000 RPM Stumble - Solved!!! YES!!!
Posted by Evil Twin Skippy (more from Evil Twin Skippy) on Thu, 24 Jan 2002 14:49:13
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Hello all,
You may recall a while back that I was having a serious issue with a serious stumble and loss of power at about 2000RPM in all gears ('89 9kS auto). I have, in the last 2 months replaced a good bit of the fuel injection system (AMM, FPR, ECU, O2, Fuel filter, etc.), plus plugs, cap and rotor, etc... No help.
Took it two shops, inluding my local indie. Both said it had to be an electronics problem (short, broken wire, etc.) and would be glad to do pin by pin fault trace and charge hourly rate. No thanks.
Broke down and took it up to Andrews of Princeton (premier sponsor link), where I buy all my Saabs. They were somewhat stumped as well, but after looking at the obvious, did a fuel pressure check (which another Tech at the other shop I went to had insisted was a waste of money).
SOLUTION: failing 6 month old fuel pump! Enough pressure to start and idle, run fairly well wide open and look good at idle, BUT not enough to make the transition from low to high RPM without major stumbling. The injectors open up and the pressure plummets (under 20 PSI). I bought the pump from them in July. Warrentee exchange. No problem. Nice folk.
Best part - with all that new FI and ignition equipment, the car CRUISES!!! Pricey all together repair, but a lot of items I won't have to worry about for a long time.
Thanks to all here who gave suggestions when I was tearing my hair out and especially to TW at thesaabsite.com (sponsor link), and Jim at Sobstory.com (TSN sponsor). Good advice and service.
ETS
'89 9kS 117K
'88 900S 158K
posted by 209.98.25...
Posts in this Thread:
- 2000 RPM Stumble - Solved!!! YES!!!, Evil Twin Skippy, Thu, 24 Jan 2002 14:49:13 <-- Viewing This Message
- good to hear ets! (nm), nt moore, Thu, 24 Jan 2002 16:45:07
- ALLRIGHTTTT!!!!, KeithR, Thu, 24 Jan 2002 16:06:18
- Yeeah, That's the worst thing when new parts fails.>>, Anders, Thu, 24 Jan 2002 15:51:52
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