Thanks guys,
Great ideas on ways to check the throttle body for leaks. This weekend I will tackle the alternator no-power problem. Then move forward.
Jim: injectors are the originals on the brand new engine, so I have to assume they are the correct size.
>>WD-40 - I've had good luck finding vacuum leaks using WD-40. With the engine running, spray WD-40 around the intake gasket and other places you suspect a leak. Since WD-40 is flammable, the engine will change speed if it sucks some liquid into the intake. If the engine speed changes, you've found your leak. For safety purposes, and to keep the WD-40 from spraying you in the face, you may want to remove the prop.
VACUUM GAUGE - Another way to diagnose engine problems is with a vacuum gauge. See
http://autospeed.com/cms/title_Using-a-Vacuum-Gauge-for-Engine-Diagnostics/A_2393/article.htmlMark S.
PINCH HOSE - One way to test for intake manifold leaks is to pinch off hoses one by one while the engine is running to see if RPM decreases. You could also remove the each hose at the manifold an plug the inlet. Also be sure that the intake manifold gasket and throttle body gasket are sealing good and that all bolts are tight.
FUEL INJECTORS - Are you using the right fuel injector for your application?
YES - ORIGINALS
Such large jumps may be due to improper injector sizing.
The Geo engine is a fuel sipper rather than a gas guzzler so it would require
an injector that can meter fuel much more precisely.
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Mike
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Mike Fontenot
Apex Consulting & Services LLC
Lakewood, Colorado
303 / 731-6645
mikef AT
apexconsultingservices DOT com
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