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Re: Idle control problems on 89 SPG Posted by RS [Email] ![]() ![]() ![]() In Reply to: Idle control problems on 89 SPG, Wil W ![]() |
$4k on repairs?!?!? wow
I'm surprised that there was a dashopt to replace. There isn't supposed to be one on the '89 900Ts. There's not even threading to accept the bolts for the dashopt mount on the throttle body of my '89 SPG.
Anyway ...
There are a few fairly simple DIY things you can do to even the idle:
1. Replace all vacuum lines with silicone vacuum hose - about 25 feet of 3.5 mm hose will do the underhood lines. About $1 per foot at a place like NOPI or a bit more from some of the sponsors. Procedure - pull off the hoses one at a time, cut new hose to length, install, go to the next one.
2. Replace all of the rubber bushings that hold vacuum nipples onto the intake manifold and valve cover. About $16 for the bushings from the dealer or less from one of the sponsors. You may also have a cracked vacuum nipple. Check with the sponsors for prices.
3. Replace the fuel pressure regulator. About $40 from one of the sponsors. I got significantly better idle, power and gas mileage when I replaced the one on my '89 last week. Easy job.
Grounds check shoud be fairly easy. You can see the main ground on the engine between a pair of the intake manifold runners. Loosen the bolt honding the wire bundle to the engine, clean the bolt and the place where it seats on the engine, and replace.
The site sponsor that I get most of my parts from is http://www.Sobstory.com. Jim has been a great source of help on my projects.
RS
'89 SPG
'88 SPG (RIP)
posted by 205.188.19...
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