MY 94 vette converible has a very noisy knocking going on underneath can anyone suggest why?

Asked by plorenzo Sep 18, 2010 at 01:01 PM about the 1994 Chevrolet Corvette Convertible RWD

Question type: Maintenance & Repair

I have recently replaced the ecm/pcm.  the knocking problem happened after I had a problem with the Vette cuting out on me and running rough and the soothing out.  This problem did come up during the time we were trying to troubleshoot the original problem.  The clanking underneath sounds like some thing has come loose, it is very loud, but the motor seems to be running fairly smooth now. Are there any suggestions???

2 Answers
20,115

Mike answered 14 years ago

Many ideas :) Exhaust hitting floor pan , Trans Mount broken , Motor mount broken , rear end mount worn, Ujoints worn Hows that for a start

Mark helpful
35

Nathan answered 14 years ago

Does it do this all the time? Only in gear? These cars had a dual mass flywheel that would hit the transmission bell-housing when there is a misfire or rough running condition. A lot of times a (or a few) bad injectors can cause this. Use an Ohm meter and measure each injector, it should read near 15 Ohms. If you see anything +/- 3 Ohms you should replace it. Google Corvette injectors. There is a company called Fuel Injector Clinic ( I think) that sells a set of reconditioned injectors for a very cheap price (compared to new). I find its best to replace all 8.

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Own this car?

Share your experience with others.

1994 Chevrolet Corvette

Write a car review

Review another car

Shortcuts

Search Chevrolet Corvette Questions

CarGurus Experts

  • #1
    John Carson
    Reputation
    5,260
  • #2
    Vincent Parker
    Reputation
    4,750
  • #3
    dandyoun
    Reputation
    1,420
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Camaro
655 Great Deals out of 8,355 listings starting at $3,240
Used Ford Mustang
947 Great Deals out of 19,852 listings starting at $1,950
Used Porsche 911
376 Great Deals out of 4,453 listings starting at $12,900
Used BMW M3
81 Great Deals out of 1,485 listings starting at $9,888
Used Ford F-150
6,461 Great Deals out of 169,177 listings starting at $1,871
Used Toyota Supra
32 Great Deals out of 595 listings starting at $35,095
Used BMW 3 Series
1,009 Great Deals out of 14,193 listings starting at $1,200
Used Mercedes-Benz C-Class
922 Great Deals out of 20,737 listings starting at $2,499

Used Cars for Sale

2025 Chevrolet Corvette For Sale
3,188 listings starting at $62,709
2024 Chevrolet Corvette For Sale
73 Great Deals out of 2,915 listings starting at $61,892
2023 Chevrolet Corvette For Sale
109 Great Deals out of 1,112 listings starting at $55,490
2022 Chevrolet Corvette For Sale
61 Great Deals out of 522 listings starting at $57,990
2021 Chevrolet Corvette For Sale
43 Great Deals out of 480 listings starting at $54,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.