montana_subie Posted January 26, 2011 Share Posted January 26, 2011 Hi, I recently got an 86 gl-10. I put 2000 miles on it no problem. Lately, it started this thing after it warms up it starts chugging. Violently sometimes. After a while it stalls. If I let it sit for a few it'll drive for a while before starting its chugging again. I've ruled out fuel pump/filters. Are there any other parts I might change? Gentle I'm a noob. Thanks. Link to comment Share on other sites More sharing options...
naru Posted January 26, 2011 Share Posted January 26, 2011 How did you rule out fuel pump/filters? Carbed or injected? Link to comment Share on other sites More sharing options...
montana_subie Posted January 26, 2011 Author Share Posted January 26, 2011 My friend I bought it from said he just changed the fuel pump, which I guess doesn't rule it out but it only chugs after I've driven 30-40 mi. And I changed filters. Its injected-turbo-1.8 Link to comment Share on other sites More sharing options...
Tycho Posted January 26, 2011 Share Posted January 26, 2011 This is a bit off the wall, but my '85 EA82T that had intermittent chugging/stalling. Sometimes it was great, other times it wasn't and would chug and stall once warm. Rolling into the throttle resulted in very non-linear acceleration too ... until the revs came up. Measured AFM voltage while opening the flapper door and it would jump around quite a bit on its journey from 0 to 5v. It was mostly noisy in the lower end of the range where the flapper spends most of its time. I took the AFM apart (dug into the electronic part by prying the plastic lid off) and used a cotton swab, a piece of paper, and some isopropyl alcohol to clean the wiper arm, carbon strip, and upper wiper arm contact (the fulcrum it pivots on is an electrical connection) and I got a lot of dust and carbon buildup (the strip wears) out of there. Car runs very very smooth now. AFM voltage is perfectly smooth as the flapper door opens. If that turns out to be your problem, this page will be helpful: http://www.clarks-garage.com/shop-manual/elect-22.htm Link to comment Share on other sites More sharing options...
naru Posted January 26, 2011 Share Posted January 26, 2011 Sounds like it might be running lean. I would unplug the coolant temperature sensor while the engine is in a bad mood.If it improves,it may or may not indicate a faulty sensor.(probably not) Fuel pressure test too. Link to comment Share on other sites More sharing options...
Cougar Posted January 26, 2011 Share Posted January 26, 2011 Check for leaky intake manifold gaskets. Link to comment Share on other sites More sharing options...
montana_subie Posted January 26, 2011 Author Share Posted January 26, 2011 Thanks for the input fellas.-ian Link to comment Share on other sites More sharing options...
swampbrat Posted January 26, 2011 Share Posted January 26, 2011 My 85 did that . It was carbed and sucking oil out of a bad PCV. Link to comment Share on other sites More sharing options...
john in KY Posted January 26, 2011 Share Posted January 26, 2011 Had an 85 XT turbo once. Similar problem. Problem in my case was a poor electrical connection. Look for a grounding wire on one of the intake manifold bolts, passenger side. Also have a good AFM for this model. Removed from an engine with 60k miles and stored for many years. $50 plus shipping if interested. Link to comment Share on other sites More sharing options...
montana_subie Posted February 10, 2011 Author Share Posted February 10, 2011 Changed the PCV valve......that did the trick! Thanks guys. Link to comment Share on other sites More sharing options...
Cougar Posted February 10, 2011 Share Posted February 10, 2011 Good deal. Thanks for the update. Link to comment Share on other sites More sharing options...
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