1991 GEO Storm Engine cooling Problems

“7 months and 5 replacement ecus on my 1991 Geo Storm gsi, and still has dangerous issues of stalling on highway and when pulling out into traffic. The problem is that between 1985 and 1995, AC delco used a insulative spray on the circuit boards in these ecus/computers which shrinks over time when exposed to warm and cool temperature conditions, such as the normal conditions that an automobile is subjected to. The shrinking insulative spray contracts and pulls the electronic components from the circuit board, breaking solder connections and causing shorts. …”

“Gm & isuzu are aware of this. Apparently they have refused to fix it. My car has just begun these symptoms but I don't want to wait until the car dies on me. This year we have had record highs in ca. It's making the problem worse. It cuts off when it feels like it for no good reason. It idles high and low. It has eve refused to start at times.”

“Engine idles uncontrolably at high rpms (2000+) when stopped, this presents a saftey threat if I should have my foot slip off the clutch or have a cable failure because the car will lurch forward before the engine dies. This could cause an accident involving a pedestrian or traffic going the other direction at an intersection.”

“When I start the car with the engine cold, as soon as the choke turns off, the engines dies, I have to tap the accelerator to keep the engine running. Once the engine is operating temperature, I shift the transaxle into park, and the idle shoots up to 2000 rpms, the engine idles up and down while the car is in park. The idle also drop temporarily when the brakes are depressed this started happening during the last week when the weather turned hot for the summer.”

“Engine control computer improperly built causing erractic idle from 2000rpm to 500rpm, car stalls and will not start. Isuzu has been contacted about this and has stated we do not make cars and they fail to rectify the problem. There are very many of us who would like to see this issue resolved as our cars stalling in traffic and idling erractically is causing a lot of problems as in poor efficiency and unneeded downtime. The problem is in the insulative spray on the main circuit bopar dof the units that breaks down over time due to heat and extreme(hot or cold) temps. …”