1990 c4 problem........!
Advanced
Joined: Jul 2004
Posts: 66
Likes: 0
The ignition coil should only run you less than $15 at autozone. The bottom of mine was all crusted over..i have no clue how that thing ever got a spark out. MIne had some of the same issues, If your IAC has gone south, it may not be moving as required, your engine is receiveing too much or not enough air and won't start and or idle. A cheap one at autozone is less than $40 I think. Definitely check the ohms on your injectors. Here in Dallas, Sears is selling a craftsman digital multimeter for only $9.99, just came out in a sale add. I bought one for about $20 a year ago, and use it on everything.
Racer
Joined: May 2002
Posts: 379
Likes: 0
From: Sacramento Ca
Originally Posted by Ronstrap01
The ignition coil should only run you less than $15 at autozone. The bottom of mine was all crusted over..i have no clue how that thing ever got a spark out. MIne had some of the same issues, If your IAC has gone south, it may not be moving as required, your engine is receiveing too much or not enough air and won't start and or idle. A cheap one at autozone is less than $40 I think. Definitely check the ohms on your injectors. Here in Dallas, Sears is selling a craftsman digital multimeter for only $9.99, just came out in a sale add. I bought one for about $20 a year ago, and use it on everything.
Start with the ignition coil. Double check all your spark wires.
Instructor
Joined: Jun 2004
Posts: 249
Likes: 0
From: clinton ut
I think I would use a can of starter fluid and spray it into the intake. If it starts with this you know you have spark and compression. If it did not start I would use a good spark tester to be sure the spark was hot (blue/white). If spark is good I would check timing. (I know it runs good sometimes but some problems are weird). My brain hurts so I'll stop here for now. 
Drifting
Joined: Nov 2000
Posts: 1,428
Likes: 1
From: Jacksonville FL
Is the '90 a MAF or S/D car. If it is a MAF car, try unplugging the MAF and see how it runs. The ECM will read the tables instead if the signal from the MAF. If this is the case in your case then look into the MAF or MAF Relays.
Just trying to help.
Just trying to help.
Melting Slicks
Joined: May 2004
Posts: 2,524
Likes: 10
From: Lufkin Texas
St. Jude Donor '05-'06
Originally Posted by Midnite 88
Is the '90 a MAF or S/D car. If it is a MAF car, try unplugging the MAF and see how it runs. The ECM will read the tables instead if the signal from the MAF. If this is the case in your case then look into the MAF or MAF Relays.
Just trying to help.
Just trying to help.
I still feel the fuel system is where your gremlins are. I at least think you should stop throwing money and parts at it and buy/borrow some diagnostic tools and go down the list of my previous post
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: May 2004
Posts: 2,524
Likes: 10
From: Lufkin Texas
St. Jude Donor '05-'06
I had read in here that they were not good but the guys a MAD convinced me that ACCEL has resolved the problems with a new design. Since I have other ACCEL components I went ahead and gambled and got them and 2k miles later she still runs GREAT!! I got the 24lbs.per hr. for my 90 l98 and with my chip and other small mods it runs real good. We'll have to see if they hold up.
