# NHTSA Preliminary Evaluation PE88029
> **THROTTLE CONTROL** · Opened 1988-02-23 · Closed 1988-09-19
## Investigation
- **Action number:** PE88029
- **Type:** Preliminary Evaluation
- **Open date:** 1988-02-23
- **Close date:** 1988-09-19
- **Manufacturer:** Chrysler (FCA US, LLC)
- **Affected makes:** JEEP
- **Affected components:** VEHICLE SPEED CONTROL:LINKAGES
- **Affected model years:** 1987, 1988
- **Affected (make, year) variants:** 6
## Summary

SUMMARY:THE PE WAS OPENED TO INVESTIGATE WHETHER JEEP'S RECALL OF CERTAIN1987 MODEL VEHICLES EQUIPPED WITH THE 4.0 LITER FUEL INJECTED 6 CYLINDERENGINE (87V-035) HAD INVOLVED ALL THE POTENTIALLY AFFECTED VEHICLES.AREVIEW OF THE ODI FILES HAD INDICATED THAT 1987-1988 JEEP VEHICLESEQUIPPED WITH THE 4.O LITER ENGINE ALSO WERE EXPERIENCING SOME THROTTLECONTROL PROBLEM.A REVIEW OF THE WARRANTY CLAIMS AND THE AVAILABLEINCIDENT REPORTS DOES NOT INDICATE THAT A POTENTIAL DEFECT TREND EXISTSOR IS DEVELOPING.THE WARRANTY CLAIMS ATTENUATE, AND THE ALLEDGEDINCIDENTS APPEAR TO BE CAUSED BY A VARIETY OF FACTORS. #===

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE88029)
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