engine dies at speed on highway

Subject: engine dies at speed on highway Mon May 19, 2008 7:21 pm

at 40-60 mph engine cuts/dies...coast to side of road, cool, starts-up, computer command block displays "electrical problem", diagnostics haven't id'd specific electrical problem...Anybody have suggestions? Thanks.

Subject: Re: engine dies at speed on highway Mon May 19, 2008 9:52 pm

We had a similar problem on an '86, turned out to be the 'distributor' or ignition module, I forget exactly what they called it. But it could also be the crank position sensor or a few other possibilities I forget.

You know how to cheat into the advanced diagnostic in the CRT, right? (Does the '89 still have the CRT?)

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'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

Subject: Re: engine dies at speed on highway Tue May 20, 2008 7:41 pm

Selected into the CRT (Centered on Dash W/Screen Display) response I'm getting is generic electrical. Distributor Module sounds like a real reasonable possibility.

Borrowed an EZ Link Diagnostic Scanner today...1st try "car isn't communicating". Continuing to problem solve. Thanks for the help!

Subject: Re: engine dies at speed on highway Tue May 20, 2008 9:21 pm

I'm talking about diagnostic mode - you push something like 'Heat' and 'Off' at the same time and you can browse every sensor the PCM can see. I don't know if that will help you with this problem, but I think you can see things like distributor voltage and coil outputs.

An excellent diagnostic tool - you don't need a scanner!! Built in!

_________________
'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS