1995 Ford Aerostar Chugging - Engine

Question: 4.0 AWD with 140k miles. Started about 20K miles ago and just gets worse every summer. After engine is turned off hot, is seems loaded up on restart for a minute or two(unless is sits for about 2-3 hours). If the weather is normal or cool there is never a problem. Exact same thing happened on my other Aerostar at about the same mileage. Can't say for sure, but it could be a tad worse with gasahol.

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Technican: What if any repairs did you do to the prior vehicle? The problem you are discribing sounds like an iherrent problem that Fords have. Without scanning the system for any types of codes, there are several factors that come into play, namely the MAF, O2, TPS sensors and quite possibly the fuel injection. Check with one of your local parts houses(Pep Boys, Auto Zone, etc).Some offer this sevice free or at a nominal charge. If a codee is retrieved, dont take there word as to the correction but rather ask if they can supply you or guide you to where for the flow chart that pertains to the code retrived. I have seen too many people stop at the first part on the chart only to have the problem reoccur. You must follow the chart in its entirerty to make sure problem is solved. Again a scanner device needs to be involved. Depending on the type of scanner the tech uses, all codes new and old can be retrieved if used right. When one code is taken care of a new one my appear or if one of the old ones that was retrievd relates to the part that has just been replaced, theres a good chance that the old code has a direct factor with this part and needs to be scrutinized. As far as the gasahol, if the vehicles injectors cant relate with this type of fuel, you may have an injector(s) clogged or continuing to dump fuel into the chambers after shut down. Again, a code would be present for this type of situation.If this is the case, I would have the fuel injection throughly flushed and cleaned and add an injection cleaning additive to the gas(make sure to read the label to see if it is compatable with the gasahol) before going directly to changing out the injectors.Once this is done, again, the code needs to be removed to assure proper relays through the system. Paul

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