Why does my Isuzu pickup miss at steady speed?

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My 1990 Isuzu pickup runs fine when I'm accelerating but misses and backfires at steady speed, even when I'm going downhill. The mechanic checked the carburetor, etc. but can't find anything.

shumaker25071b

Aug 9, 2017

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What are the best Isuzu repair shops?

RepairPal Certified shops can diagnose and repair your 1990 Isuzu Pickup. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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Certified Locations

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Tuffy Tire & Auto Service Center - Grandview

4.7

(89)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

Excite Auto Repair & Towing

4.4

(15)

5.94 mi

3430 Westerville Road

Columbus, OH

Closed

Opens 9:00 AM Tue

Call

All In Auto Service

4.6

(37)

6.56 mi

5200 Fisher Road

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

Tuffy Tire & Auto Service - Grove City

4.3

(525)

6.67 mi

2131 Stringtown Rd

Grove City, OH

Closed

Opens 7:30 AM Tue

Call

Blackstone Complete Auto Care

(39)

6.77 mi

4800 Sinclair Road

Columbus, OH

Closed

Opens 9:00 AM Tue

Call

Boyd's Tire & Service - Columbus

4.7

(193)

7.23 mi

5263 Godown Rd

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

See All 30 Locations

Tuffy Tire & Auto Service Center - Grandview

4.7

(89)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

Excite Auto Repair & Towing

4.4

(15)

5.94 mi

3430 Westerville Road

Columbus, OH

Closed

Opens 9:00 AM Tue

Call

All In Auto Service

4.6

(37)

6.56 mi

5200 Fisher Road

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

Tuffy Tire & Auto Service - Grove City

4.3

(525)

6.67 mi

2131 Stringtown Rd

Grove City, OH

Closed

Opens 7:30 AM Tue

Call

Blackstone Complete Auto Care

(39)

6.77 mi

4800 Sinclair Road

Columbus, OH

Closed

Opens 9:00 AM Tue

Call

Boyd's Tire & Service - Columbus

4.7

(193)

7.23 mi

5263 Godown Rd

Columbus, OH

Closed

Opens 8:00 AM Tue

Call

See All 30 Locations

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